problem:
A car travels 70 miles in 2 hours.
How far would it travel in 5 hours?
answer:
1. step: proportion
: 2 hours – 70 miles
* 5 hours – x miles
2. step: which proportion?
↑more hours ↑more miles = directly proportional
3. step: formula
x = 70 * 5
2
x = 175 miles
4. step: answer
It would travel 175 miles.