Question

Choose the system of equations which matches the following graph:

a) 3x + 2y = 8
6x + 4y = 20

b) 3x - 2y = 8
6x + 4y = 20

c) 3x + 2y = 8
6x - 4y = 20

d) 3x - 2y = 8
6x - 4y = 20

Answer 1

3x - 2y = 8

- 2y = 8 - 3x

2y = 3x - 8

y = 1.5x - 4

This is the red graph

6x - 4y = 20

- 4y = 20 - 6x

4y = 6x - 20

y = 1.5x - 5

This is the blue one.

So it must be answer d)