the total cost of gary cell phone plan includes a one time cost for a phone plus a monthly fee this table shows the total cost if gary's cell phone plan as it accumulates from month 1 though month 5 what is the monthly fee for gary's cell phone plan

20$ increasing every month

Step-by-step explanation:

This problem is a slope problem, so his cell phone plan increases by 20$ every month, so solve for slope

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!

8

step-by-step explanation: