Question

The cost for 7 dance lessons is $82. The cost for 11 is $122. Write a linear equation to find the total cost for C for L lessons. Then use the equation to find the cost for 4 lessons.

Answer 1

let
C=aL+b
and b are constant

Answer 2

now l=7
C=82
82=a*7+b

Answer 3

for second
122=11a+b
solve these 2equation

Answer 4

for a and b