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2 years ago

63 POINT!!!!! GUYS, I NEED HELP WITH PLSSSSS NO CHEAT THANK YOU!!

Mathematics

1 answer:

nikdorinn [45]2 years ago

6 0

Answer:

236

Step-by-step explanation:

We assume the cost is a linear function of the number of lessons. That means the slope is the same everywhere.

Let (lessons, cost) = (x, y). We have (4, 84), (8, 160), (12, y3).

(y2 -y1)/(x2 -x1) = (y3 -y2)/(x3 -x2)

(160 -84)/(8 -4) = (y3 -160)/(12 -8)

76 = y3 -160

y3 = 160 +76 = 236

The cost will be $236 for 12 lessons.

The cost function is ...

y = 19x +8 . . . . for x lessons

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