3 The rates for two homework help services are shown below.
Homework SOS
Homework Lifeline
45
Rates for Our Services
40
35
ū30
25
• Pay $25 to set up an account
with our service.
Cost ($)
20
15
10
. Then pay $0.40 for each
minute of homework
assistance that you receive.
5
0
0 10 20 30 40 50 60 70
Minutes
Part A Which service has the greater rate of change? Which has a greater initial value?
Describe what this means in the context of the problem.
Show your work.