r= change in y
chAnswer:
C. The relationship is not linear.
Explanation:
When the rate of change is constant of one variable is corresponding to the change in the other variable , then the relationship is said to be linear.
The rate of change is given by:-
r= change in y and in x
⇒r= 2-1 and 7 -3=1/4
Also,
⇒r= 5-3 and 18-11=2/7
but 1/4 ≠ 2/7
Therefore, the rate of change is not constant .
Hence, The relationship is not linear.