Ordinate axis means y-axis, which is x = 0
 1. Set 
x = 0 in the equation 
3x - 4y = 12 .
2. Substitute 
x = 0 into the equation: 
3(0) - 4y = 12 .
3. Simplify to find 
y : 
-4y = 12 .
4. Divide by 
-4 : 
y = -3 .
5. Therefore, the intersection point is 
\left(0, -3\right) .