The answer of 18 is y = 0.5x + 0
The answer of 22 is y = -0.4x + 0
Explanation:
c is constant, m is gradient
18. m = 1/2
m = 0.5
1 = 0.5(2) + c
1 = 1 + c
c = 0
y = 0.5x + 0
22. m = 2/-5
m = -0.4
2 = -0.4(-5) + c
2 = 2 + c
y = -0.4x + 0
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