[plz
the equation of the line with x-intercept 4 and y-intercept 1 can be written in the form y = mx + b where
the number m is:
the number b is:

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.