Question

What equation models the data in the table if d = number of days and c = cost? Days Cost 2 6 3 9 5 15 6 18

Answer 1

Answer: The equation models the data is given by

`c=3d`

Explanation:

Since we have given that

Days Cost

2 6

3 9

5 15

6 18

Let the number of days be 'd'.

Let the cost be 'c'.

So, we can see that there is direct variation between d and c :

`(d)/(c)=(2)/(6)\\\\(d)/(c)=(1)/(3)\\\\c=3d`

Hence, the equation models the data is given by

`c=3d`