Look at the following function:
x y
−6 −13
−4 −9
−2 −5
0 −1
Mark said that the function is linear.
Jason said that the function is nonlinear.
Which of the following explains who is correct?
A. Mark, because for every 2-unit increase in x, there is an increase in y by 4
B. Mark, because for every 4-unit increase in x, there is an increase in y by 2
C.Jason, because the point (0, −1) does not lie on the straight line that contains the other points
D. Jason, because the point (−6, −13) does not lie on the straight line that contains the other points

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