A text message plan costs $7 per month plus $0.28 per text. Find the monthly cost for x text message

[math_celebrity]

A text message plan costs $7 per month plus $0.28 per text. Find the monthly cost for x text messages.

We set up the cost function C(x) where x is the number of text messages per month:
C(x) = Cost per text * x + Monthly cost

Plugging in our given numbers, we get:
C(x) = 0.28x + 7