# 8F4 Practice

## Quiz by Stephanie Mathias

Mathematics
Common Core

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10 questions
• Q1
A taxi company charges a flat fee of \$3 plus \$2 per mile. If x represents the number of miles and y represents the total cost, what is the rate of change in this linear relationship?
No rate of change
\$3 per mile
\$5 per mile
\$2 per mile
30s
8.F.B.4
• Q2
Jill is saving money for a concert ticket. She already has \$45 and plans to save \$10 every week. If x represents the number of weeks and y represents the total amount saved, what is the initial value of this linear function?
\$55
\$45
\$0
\$10
30s
8.F.B.4
• Q3
A coffee shop sells a small coffee for \$1.50. Each extra shot of espresso costs an additional \$0.75. If x represents the number of extra shots and y represents the total cost of the coffee, what is the initial value of this linear function?
\$1.50
\$2.25
\$0.75
\$0
30s
8.F.B.4
• Q4
Sarah is planning to rent a car for a trip. The rental company charges a daily fee plus a per-mile charge. She finds a plan that costs \$50 per day and \$0.20 per mile. If x represents the number of miles she plans to drive and y represents the total cost of the rental, what does the rate of change represent in this scenario?
\$50 per mile
\$70 total cost
\$0.20 per mile
\$50 per day
30s
8.F.B.4
• Q5
During a school fundraiser, the total amount of money raised, y, is a linear function of the number of tickets sold, x. If one ticket is sold for \$5 and there is an initial contribution of \$100, what does the initial value of this linear function represent?
\$100
\$105
\$5
The price of one ticket
30s
8.F.B.4
• Q6
A company offers a smartphone app subscription service. The service costs a monthly fee of \$15, and an additional \$2 for every gigabyte (GB) of data used above the included 10GB. If x represents the number of gigabytes used above 10GB and y represents the total monthly bill, what is the rate of change in this linear relationship?
\$17 per GB
\$15 per month
\$10 per GB
\$2 per GB
30s
8.F.B.4
• Q7
Kevin tracks the distance he walks every day for a week and finds that he walks an additional 0.5 miles each day. If x represents the day of the week (with day 1 being Monday) and y represents the total distance walked in miles, what does the rate of change represent in this scenario?
0.5 miles per day
3.5 miles per week
1 mile per week
1 mile per day
30s
8.F.B.4
• Q8
A small bakery sells cupcakes for \$2 each. There is also a one-time catering setup fee of \$30 for any order. If x represents the number of cupcakes ordered and y represents the total cost of the order, what is the initial value of this linear function?
\$30
No initial value
\$2
\$32
30s
8.F.B.4
• Q9
A landscaper charges a flat fee for a consultation and then an hourly rate for the actual landscaping work. If the consultation fee is \$75 and the hourly rate is \$25, if x represents the number of hours worked and y represents the total cost of the service, what does the rate of change represent in this scenario?
\$0 per hour
\$75 per hour
\$100 per hour
\$25 per hour
30s
8.F.B.4
• Q10
Linda is saving money for a new bike by setting aside a portion of her allowance each week. She starts with \$20 and saves an additional \$15 every week. If x represents the number of weeks and y represents the total amount saved, what is the initial value of this linear function?
\$20
\$35
\$15
\$0
30s
8.F.B.4

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