Question

Solve this function for me: g (x) = a log4 (b(x - h)) + k . It passes through the points (x,y) (5, 4.5) and (13, 3.5)

288

likes
1439 views

Answer to a math question Solve this function for me: g (x) = a log4 (b(x - h)) + k . It passes through the points (x,y) (5, 4.5) and (13, 3.5)

Expert avatar
Dexter
4.7
113 Answers
We are given the function g(x) = a\log_{4}(b(x-h)) + k and two points that the function passes through: (5, 4.5) and (13, 3.5).

Using the point (5, 4.5), we get:
4.5 = a\log_{4}(b(5-h)) + k

And using the point (13, 3.5), we get:
3.5 = a\log_{4}(b(13-h)) + k

Now, we have a system of two equations:
\begin{cases}\begin{cases}\end{cases}

Subtracting the second equation from the first:
4.5 - 3.5 = a(\log_{4}(5h) - \log_{4}(13h))
1 = a(\log_{4}(\frac{5h}{13h}))
1 = \log_{4}(\frac{5}{13})a
a = \frac{1}{\log_{4}(\frac{5}{13})}

Then, substitute back to solve for k :
4.5 = \frac{1}{\log_{4}(\frac{5}{13})} \log_{4}(5h) + k
4.5 = \frac{\log_{4}(5h)}{\log_{4}(\frac{5}{13})} + k
4.5 = \log_{\frac{5}{13}}(5h) + k
4.5 = \frac{\ln(5h)}{\ln(\frac{5}{13})} + k
4.5 = \frac{\ln(5) + \ln(h)}{\ln(\frac{5}{13})} + k
4.5 = \frac{\ln(5) + \ln(h)}{\ln(5) - \ln(13)} + k
4.5 = \frac{\ln(5h)}{\ln(5) - \ln(13)} + k
4.5 = \log_{5/13}(5h) + k
4.5 = \log_{5/13}(5) + \log_{5/13}(h) + k
4.5 = 1 + \log_{5/13}(h) + k
3.5 = \log_{5/13}(h) + k
3.5 -1 = \log_{5/13}(h)
2.5 = \log_{5/13}(h)
h = \left( \frac{5}{13} \right)^{2.5}

Therefore, the values of the constants a , b , h , and k are:
a = \frac{1}{\log_{4}\left(\frac{5}{13} \right)}
h = \left(\frac{5}{13}\right)^{2.5}

\textbf{Answer:} The values of the constants a and h are a = \frac{1}{\log_{4}\left(\frac{5}{13} \right)} and h = \left(\frac{5}{13}\right)^{2.5} .

Frequently asked questions (FAQs)
How long does it take a car traveling at 60 mph to travel 120 miles?
+
What is the amplitude, period, and range of the sine function f(x) = sin(x) ?
+
What is the domain and range of the cubic function f(x)=x^3?
+
New questions in Mathematics
HeyπŸ‘‹πŸ» Tap "Create New Task" to send your math problem. One of our experts will start working on it right away!
2(2+2x)=12
Consider the relation R defined on the set of positive integers as (x,y) ∈ R if x divides y. Choose all the true statements. R is reflexive. R is symmetric. R is antisymmetric. R is transitive. R is a partial order. R is a total order. R is an equivalence relation.
What payment 7 months from now would be equivalent in value to a $3,300 payment due 23 months from now? The value of money is 2.7% simple interest. Round your answer to 2 decimal places. Show all work and how you arrive at the answer..
An electrical company manufactures batteries that have a duration that is distributed approximately normally, with a mean of 700 hours and a standard deviation of 40 hours. Find the probability that a randomly selected battery has an average life of less than 810 hours.
-27=-7u 5(u-3)
If f(x,y)=6xy^2+3y^3 find (∫3,-2) f(x,y)dx.
-3(-4x+5)=-6(7x-8)+9-10x
How many anagrams of the word SROMEC there that do not contain STROM, MOST, MOC or CEST as a subword? By subword is meant anything that is created by omitting some letters - for example, the word EMROSCT contains both MOC and MOST as subwords.
What is 28 marks out of 56 as a percentage
3 A tree is planted when it is 1.2 m tall. Every year its growth is 3/8 of its previous year's height. Find how tall the tree will grow.
Convert 9/13 to a percent
A machine produces 255 bolts in 24 minutes. At the same rate, how many bolts would be produced in 40 minutes?
Solve equations by equalization method X-8=-2y 2x+y=7
List five numbers that belong to the 5 (mod 6) numbers. Alternate phrasing, list five numbers that satisfy equation x = 5 (mod 6)
Total Users with an active Wise account = Total Active Users + Total Users who haven’t transacted Total Active Users = Total MCA Users + Total Send Users = Total New Users + Retained Users Total New Users = New Send Users + New MCA Users Total MCA Users = New MCA Users + Retained Users who transacted this month via MCA Total Send Users = New Send Users + Retained Users who transacted this month via Send Send CR = Total Send Users / Total Users with an active Wise account MCA CR = Total MCA Users / Total Users with an active Wise account New Send CR = New Send Users / New Profiles Created in Month New MCA CR = New MCA Users / New Profiles Created in Month We have recently witnessed a drop in MCA conversion, but send user conversion is stable, can you help explain why?
A salesperson earns a base salary of $600 per month plus a commission of 10% of the sales she makes. You discover that on average, it takes you an hour and a half to make $100 worth of sales. How many hours will you have to work on average each month for your income to be $2000?
Gender and communication : Answer the question ( 1 paragraph is ok) . Please can you write about women? Compared to your other identities, how much of a role does gender play in your life? And has your own sex/gender offered you privileges or disadvantages? How so?
The average weekly earnings in the leisure and hospitality industry group for a re‐ cent year was $273. A random sample of 40 workers showed weekly average ear‐ nings of $285 with the population standard deviation equal to 58. At the 0.05 level of significance can it be concluded that the mean differs from $273? Find a 95% con‐ fidence interval for the weekly earnings and show that it supports the results of the hypothesis test.
I have a complex function I would like to integrate over. I can use two approaches and they should give the same solution. If I want to find the contour integral βˆ«π›Ύπ‘§Β―π‘‘π‘§ for where 𝛾 is the circle |π‘§βˆ’π‘–|=3 oriented counterclockwise I get the following: ∫2πœ‹0𝑖+3π‘’π‘–π‘‘βŽ―βŽ―βŽ―βŽ―βŽ―βŽ―βŽ―βŽ―βŽ―βŽ―βŽ―βŽ―βŽ―βŽ―βŽ―βŽ―βŽ―π‘‘(𝑖+3𝑒𝑖𝑑)=∫2πœ‹03𝑖(βˆ’π‘–+3π‘’βˆ’π‘–π‘‘)𝑒𝑖𝑑𝑑𝑑=18πœ‹π‘– If I directly apply the Residue Theorem, I would get βˆ«π›Ύπ‘§Β―π‘‘π‘§=2πœ‹π‘–Res(𝑓,𝑧=0)=2πœ‹π‘–