8. The graph shows the cost of a long distance phone call.
Cost of a Long Distance
Phone Call
a. Find the slope of the line.
b. Explain the meaning of the slope as a rate
of change.
Cost (dollars)
y
3.00
2.50
2.00
1.50
1.00
0.50
0
o
c. How much money is added to the phone bill
if you talk for 5 extra minutes?
5 10 15 20 25 30 x
Minutes talked
d. How many minutes did you talk if the phone
call costs $3?

Igot the answer of 15.8 years.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.