Answer:
B
Step-by-step explanation:
Given the function 
Find the average rate of change on interval ![[t_1,t_2]:](https://tex.z-dn.net/?f=%5Bt_1%2Ct_2%5D%3A)

This value is negative only for
so correct option is B
Answer: The amplitude of light waves is associated with our experience of brightness or intensity of color, with larger amplitudes appearing brighter.
so hard.but i will help you
U is 2 because -7x2 is -14 +7=-7 and 2-9 also =-7
hope this helps