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amethystb
Hi! So if this is on a graph the line would be straight up and down. However if you are given an ex tell you you would insert the x value into the equation by multiplying it by 4 to get the Y value.
k. not 100% sure 


y=4x
y= 4 x substitute -2-2 for x x 
y y
y=4(-2) y=4-2