1. The graph shows that for every 5 hours, Dario makes $60.
60 / 5 = $12
The answer to question 1 = $12 or b
2. According to the graph, Kate burns 70 calories every 10 minutes, therefore,
70 / 10 = 7 calories / minute
Rick burns 1 more calorie per minute than kate.
Answer choice b is correct.
3. According to the graph, Jeffery walks 400 meters every 5 minutes, therefore,
400 / 5 = 80 meters / minute.
We need to figure out how many meters Fumi walks every 1 minute. Plug 1 into x for the equation y = 85x
y = 85(1)
Simplify the right side
y = 85.
Fumi walks 85 meters every 1 minute.
Jeffery walks 5 meters per minute slower than Fumi.
Answer choice c is correct