Mathematics
Grade 8
15 min
Write linear functions: word problems
Write linear functions: word problems
Tutorial Preview
1
A taxi charges a $3 fee plus $2 per mile. Write a function for the total cost.
2
A factory makes 10 cars per hour. Write a function for the total cars made.
3
A phone has a 100% charge and loses 5% per hour. Write a function for the remaining charge.
Sample Practice Questions
Easy
A baker has 10 cookies and bakes 12 more each hour. Write a function for the total cookies `y` after `x` hours.
0.y=12x+10
1.y=10x+12
2.y=22x
3.y=12x-10
Easy
A plant grows 2 inches per week. Write a function for its height `y` after `x` weeks, assuming it started at 0 inches.
0.y=2x
1.y=x+2
2.y=2x+2
3.y=2
Easy
You have $50 and spend $5 each day. Write a function for the money `y` you have left after `x` days.
0.y=-5x+50
1.y=5x+50
2.y=50x-5
3.y=45x
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