(05.03)
What is the rate of change and initial value for the linear relation that includes the points shown in the table?
x y
1 20
3 10
5 0
7 -10
a. initial value:20, rate of change: 10
b. initial value:30, rate of change: 10
c. initial value:25, rate of change: -5
d. initial value: 20, rate of change: -10