Maria created a graph of b(t), the temperature over time. for the interval between t = 3 and t = 7, the average rate of change in her graph of b(t) is 8. which statement must be true?
a. the temperature was 8 degrees higher when t = 7 than when t = 3.
b. the temperature was 8 times higher when t = 7 than when t = 3.
c. the temperature was 32 degrees higher when t = 7 than when t = 3.
d. the temperature was 2 degrees higher when t = 7 than when t = 3.