A company discovers that to produce 520 new electronic parts, it will cost $42960. To produce 820 new electronic parts, it will cost $64860.

Compute the slope of the costs and choose the most accurate statement from the following:

Costs are increasing at a rate of $75 per item.
Costs are decreasing at a rate of $73 per item.
Costs are decreasing at a rate of $75 per item.
Costs are decreasing at a rate of $70 per item.
Costs are increasing at a rate of $70 per item.
Costs are increasing at a rate of $73 per item.

Question

A company discovers that to produce 520 new electronic parts, it will cost $42960. To produce 820 new electronic parts, it will cost $64860.

Compute the slope of the costs and choose the most accurate statement from the following:

Costs are increasing at a rate of $75 per item.
Costs are decreasing at a rate of $73 per item.
Costs are decreasing at a rate of $75 per item.
Costs are decreasing at a rate of $70 per item.
Costs are increasing at a rate of $70 per item.
Costs are increasing at a rate of $73 per item.

anonymous · Answer

They give you two points (520, 42960) and (820,64860) Do you know how to compute the slope from here?

anonymous · Answer

yes.

anonymous · Answer

Then there you go.

anonymous · Answer

But then the answer is 52, which isn't a choice.

anonymous · Answer

I get 73 how are you computing the slope?

anonymous · Answer

y2-y1/x2-x1

anonymous · Answer

Yep, that's correct. Try again it is just an arithmetic error

anonymous · Answer

64860-49260 = 15600 & 820 - 520 =300

15600/300 = 52?