The cost of a prepaid cell phone plan from 123-Phone includes an activation fee
plus a cost per minute. The total costs are represented in the table below.
123-PhoneMinutes Used (t) | Total Cost (f(t)) |
0 | $7.50 |
1 | $7.55 |
2 | $7.60 |
3 | $7.65 |
4 | $7.70 |
| |
ABC-Phone also charges an activation fee plus
a rate per minute. The total cost for
ABC Phone’s plan when
t minutes are used is
given by
.
Part A: Write a statement
comparing the
y-intercepts of these functions. Explain how you found your
answer.
Part B: What is the meaning of each
y-intercept in the context of the
real-world situation? Compare the
y-intercepts in this context.
Part C:
Function
f is represented by a table and
g is represented by an equation. Show
at least two different ways to represent
f and
g in the same way. Explain how to
determine the
y-intercepts from each representation.