Posted by chchch on Thursday, July 5, 2012 at 10:09pm.
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.

math  Reiny, Thursday, July 5, 2012 at 10:19pm
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)
= (430290)/(2013) = 140/7 = 20
equation:
y290 = 20(x13)
arrange it in any way you want.
e.g.
y = 20x  260 + 290
y = 20x + 30 would be the slopeyintercept form

math  Nick, Monday, December 5, 2016 at 3:55pm
What is the answer for B
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