How to write a function????

Write a function rule that models each situation
1. You rent a bicycle for $20 plus $2 per hour
2. An auto repair shop charges $50 plus $25 per hour
3. A candle is 6 inches tall and burns at a rate of 1/2 inch per hour
4. A cellular phone service provider charges $0.10 per minute plus a flat fee of $5.00 each month
5. The temperature is 15 degrees and it is expected to fall 2 degrees each hour during the night.

If you can answer please do.

Hi,

1. You rent a bicycle for $20 plus $2 per hour

y = 2x + 20

2. An auto repair shop charges $50 plus $25 per hour

y = 50 + 25x

3. A candle is 6 inches tall and burns at a rate of 1/2 inch per hour

y = 6 – 1/2x

4. A cellular phone service provider charges $0.10 per minute plus a flat fee of $5.00 each month

y = 5 + .1x

5. The temperature is 15 degrees and it is expected to fall 2 degrees each hour during the night.

y = 15 – 2x

I hope that helps!!

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