A company discovers that to producex=540 new electronic parts, it will cost y=$50880. to produce 720 new electronic parts, it will cost $66540

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

-cost are decreasing at a rate of $87 per item

-costs are decreasing at a rate of $85 per item

-costs are increasing at a rate of $88 per item

-costs are increasing at a rate of $87 per item

-costs are increasing at a rate of $85 per item

-costs are decreasing at a rate of $88 per item