math
posted by dan on .
compare two cell phone companies and determine which is the better deal. Needs to be in a y=mx+b equation for each company.
company a $40 base rate plus every minute costs .05
company b base rate $30 plus every minute costs .07
based on 800 minutes
PLEASE HELP ME ASAP!

a = 800(.05) + 40
a = $440
b = 800(.07) + 30
b = $590