Christine is interested in buying a new backpack. She compares the price and volume of several backpacks. Christine finds that the relationship between price and volume can be described by the following least square regression line: Predicted Price = 890 - 105(Backpack Volume).

What is the slope of Christine’s data?

a) -105 price/volume
b) -105 volume/price
c) 105 price/volume
d) 105 volume/price