(4,-2) does not lie on the line
Here, we want to select the point that is not a solution to the graphed line
What we have to do is just to susbtitute the value of x and y. If by aritjmetic operation, the result is 16, then the point lies on the line
We proceed as follows;
a) (4,-2)
-2(4) -4(-2)
-8+8 = 0
This lies on the line
b) (1, -4.5)
-2(1)-4(-4.5) = -2 + 18 = 16
This is not on the line
c) (-2,-3)
-2(-2)-4(-3) = 4 + 12 = 16
d) -2(-5)-4(-1.5)
= 10 + 6 = 16
As we can see, only the first point does not lie on the line