I'm totally lost as to how to address this.

Given the following which statement is correct?
Y=1250(X)-0.120294

Four (4) Possible answers:
a)The slope equals 1 - 0.120294 = .8797 or 87.97%
b)Y is the cost of the first unit.
c) Y represents the cost of the 1250th unit
d)The slope equals 92%

None of the answers are correct.

Slope is 1250
the first unit costs 1250-.120294
the cost of the 1250 unit is 1250
(Y represents the total cost of x units)