13. What equation models the data in the table if d = number of days and c = cost?

Days
2
3
5
6
Cost
6
9
15
18

A. c = 3d

B. d = 3c

C. c = d + 3

D. c = d + 3d

 A. c = 3d

I'm gonna go with c = 3d

Step-by-step explanation:  c = 3d

After looking at the table I believe the equation would be c=3d. I came to this conclusion because (6)=3(2); (9)=3(3); (15)=3(5); 18=3(6). I really hope this helps!:)

Step-by-step explanation:

Days  Cost

2          6

3          9

5         15

6         18

Now to find equation that models the given data we will use two point slope form.

Formula:

Substitute the values in the formula

where y denotes the number of days and x denotes the cost

Let us suppose d denotes the number of days and c denotes the cost

So, equation becomes:  

Hence an equation models the data in the table is  

So, option A is true.

i dont know sorry

step-by-step explanation:

coins of silver or gold

step-by-step explanation: