Question

Write a function rule for the table.


c = 18d + 18

c = 18d

c = 18d + 11

c = 11d + 18

Answer 1

The answer is the Third solution.
example:
C = (18 × 2) + 11
C = 36 + 11
C = 47

Answer 2

From the given table, we have two points : (1,29) and (2,47).

Now let us use slope formula to find the slope :

$slope = \frac{y2-y2}{x2-x1}$

$slope = \frac{47-29}{2-1}$

slope =18

Now we use point slope form to get the final equation.

Using point (1,29) and slope 18,

$(y-y1)=m(x-x1)$

$(y-29)=18(x-1)$

$(y-29)=18x-18$

$y=18x+11$

So final equation becomes c=18d +11