f(-12) if f(x) = 2x + 15.

f(-7) if f(x) = 8x + 15.

f(9) if f(x) = 5x - 16.

f(x) = x - 9

f(x) = 7x

f(x) = 4x + 3

A photographer takes an average of 15 pictures per session. The total number of pictures p(s) is a function of the number of sessions s.

a. Identify the independent and dependent variables.

b. What values of the domain and range make sense for this situation? Explain.

c. Write a function to represent the total number of pictures taken. Then determine the number of pictures taken in 22 sessions.

Reason Abstractly Leon belongs to a music club that charges a monthly feet of $5, plus 0.50 per song that he downloads. Write a function to represent the amount of money m(s) he would pay in one month to download s songs. What is the cost if he downloads 30 songs?