Question

Draw the graph of equation 3x – 4y = 12. Use the graph drawn to find:

1. y₁, the value of y, when x = 4.
2. y₂, the value of y, when x = 0.

Answer 1

First, prepare a table as follows:

X	–1	0	1
Y	`-(15)/(4)`	– 3	`-(9)/(4)`

The graph of the equation can be drawn as follows:

From the graph, it can verify that

If x = 4 the value of y = 0

If x = 0 the value of y = –3.