Noah has a smart phone data plan that costs $40 per month that includes 5 GB of data, but will charge an extra $30 per GB over the included amount. How much would Noah have to pay in a month where he used 3 GB over the limit? How much would Noah have to pay in a month where he used went over by xx GB?

Total cost when over by 3 GB: 130

Total cost when over by x GB: 40+30x

Step-by-step explanation:

  b.   the average rate of change of f(x) is less than the average rate of change of g(x).

step-by-step explanation:

since the length of the interval is the same in each case, we only need to compare the change in y-value to see which is greater.

so the change in y-value for function f is (6 )) = 9.

the table tells us

so the change in y-value for function g is (31 -1) = 30.

the change in y-value of f(x) on the interval is less than the change in y-value of g(x) on the same interval, so the average rate of change of f(x) is less than the average rate of change of g(x).

tip $2.90

total $17.40