Question

A phone company charges a connection fee of $0.92 and a variable cost per minute of $0.06 for a call.

Assume the number of minutes is your independent variable (x) and the cost is your dependent variable (y).

Find 'y', the cost of a phone call that lasts x minutes.

Write your equation in the form y = _____________.

Answer 1

Answer this: If I talk for 10 minutes with my friend. What will be the charge?

Well, I'd have a mandatory charge = 0.92
Charge per minute = 0.06 per minute for 10 minutes = 0.06 * 10 minutes = 0.6$

Thus total charge for 10 minutes would be = 0.92 + 0.6 = 1.52$

Now what if I talked for 11 minutes?
12 minutes?
100 minutes?
1 hour?
x minutes?

Thus we take the unknown number of minutes as x.

Total cost = Mandatory cost + Cost per minute * x = y = 0.92 + 0.06x

Getting this? :)