CELL PHONES Many cell phone plans have an option to include more than one phone. The function for the monthly cost of cell phone service from a wireless company is f(x) = 25x + 200, where x is the number of phones on the plan. Find and interpret f(3) and f(5).

f(3)=275, f(5)=325

Step-by-step explanation:

We just plug in 3 and 5 into the equation:

We get f(x) = 25x + 200

f(3) = 25*3 + 200

=75+200

=275

Interpretation: if there are three cell phones on the plan, then the total monthly cost is 275.

for f(5):

f(5) = 25*5 + 200

=125+200

=325

Interpretation: if there are five cell phones on the plan, then the total monthly cost is 325.

if im undersanding the question correctly, its organized from 10

step-by-step explanation:

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.