SOLUTION: How do you solve this problem. (The cost of 7 dance lessons is $82. The cost for 11 lessons is $122. Write and solve an equation to find the cost of 4 lessons.

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Question 1059457: How do you solve this problem. (The cost of 7 dance lessons is $82. The cost for 11 lessons is $122. Write and solve an equation to find the cost of 4 lessons.

Found 2 solutions by jorel555, MathTherapy:
Answer by jorel555(1290) (Show Source):
You can put this solution on YOUR website!
7 dance lessons are $82 and 11 lessons are $122, so 18 lessons are $204 total.
204/18=$11.33 per lesson.
4(11.33)=x
x=$45.33 for 4 lessons. ☺☺☺☺

Answer by MathTherapy(10555) (Show Source):
You can put this solution on YOUR website!

How do you solve this problem. (The cost of 7 dance lessons is $82. The cost for 11 lessons is $122. Write and solve an equation to find the cost of 4 lessons.

Based on scenario, we have the following coordinate points: (7, 82) and (11, 122)
Slope of equation:
With slope of 10 and point, (7, 82), and slope-intercept form: equation, we get:
82 = 10(7) + b
82 = 70 + b
b = 82 - 70, or 12
Slope-intercept form, based on scenario: y = 10x + 12
y = 10(4) + 12 ------- Substituting 4 fro x
y = 40 + 12
y, or