From the given table we can have two points as : (1,34) and (4,100)
Now we can follow these step to find the equation.
Step 1:
Use slope formula to get the slope from given points.

Plugging the values,

slope =22
Step 2:
plug the value of slope and point in point slope form.
Point slope form is given by:

Using point (4,100) and slope m=22



in terms of c and d rewriting,

Answer is c=22d +12