The after-school Activities Club charges $20 to join for the year. It charges a materials fee of $ 6 for each activity you choose. Write a linear function to model the cost, c, of joining the club and choosing t activities. Find the value of the function for t equals negative 3. Explain the meaning of this function value in terms of the situation.

Which linear function models the cost, c, of joining the club and choosing t activities?

A. c = 6t + 20
B. c = 6t - 3
C. c = -3t = 20
D. c = 20t = 6