please help

[rough current]

stuck on what to do for B.

for question A i got y=0.44x+22 just need help with b

[west bluff]

What is the thing you don't understand

[rough current]

im lost on what to do for question B like what equation to put to solve it

[west bluff]

Well it's asking for the total amount and you have the amount of minutes. And you the equation you have from A. now think about what every thing represents

[chrome night]

ok so you see

you know a.) is f(x)=.44x +22

f(x) is cost
x is minutes

you know cost and dont know minutes