Asked by chchch

a company was charged $290 for 13 frames. it was charged $430 for 20 frames.
A. use the coordinates (13,290) and (20,430) to write a linear equation in point slope form that gives the relationship of the cost to the number of frames
B. find the cost for 25 frames.

Answers

Answered by Reiny
You have posted 5 questions that are done the same way. I will do this one, and you do the previous 4

slope between the two points (13,290) and (20,430)
= (430-290)/(20-13) = 140/7 = 20

equation:
y-290 = 20(x-13)

arrange it in any way you want.
e.g.
y = 20x - 260 + 290
y = 20x + 30 would be the slope-yintercept form
Answered by Nick
What is the answer for B
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