Question

Yesterday, Asher ran 3 miles in twenty-six minutes. Today, he ran 5 miles in forty-four minutes. The function that describes the relationship between the number of miles he ran and the time he ran is a linear function. How long will he run tomorrow if he runs 7 miles? Explain. I'm stumped. I try to divide them which I thought was the way to do it but I keep getting different decimals that don't make sense. Help please.

Answer 1

Can anyone help me??

Answer 2

I seriously don't have time for this.. I just need to know how to do it properly. The lessons in the course take about 5 minutes to load and I'm getting annoyed.

Answer 3

The numbers
ran 3 miles in twenty-six minutes
and
5 miles in 44 minutes
give slightly different speeds.

Does you lesson explain what you are supposed to do here ?

Answer 4

Thank you for your help. I did not see that anywhere in the lesson. I was stuck on this part too because all of the examples fit together perfectly.

Answer 5

Is this multiple choice answers?

Answer 6

No it's not. It is an essay question.

Answer 7

In that case, you can do a few things:
1) use both speeds to calculate how long it will take to run 7 miles, and say the number of minutes will have a range
or
2) use the average of the two speeds, calculate how long it takes to run 7 miles using that average speed, and say that is a good estimate.

Answer 8

Okay thank you. I will try that out now.

Answer 9

speed is distance divided by time
the first data 3 miles/26 min gives a speed of 0.1154 miles per minute
the second data 5 miles/44 min gives a speed of 0.1136 miles per minute

Answer 10

the average speed will be about 0.1145 miles per minute

Answer 11

I got 0.8015. Would this be correct using the method you stated above?

Answer 12

for what ?

Answer 13

I showed you how to find the speed up above.

you know
speed * time = distance

to find "time", divide both sides by speed. You will get
time = distance/speed

you know distance = 7 and speed is any of 3 choices (see previous posts)