Question $14(5\mathrm{.}4$ points$)$

Suppose an online retail organization regularly changes the prices of their products $($same product, but different prices from week to week$).$

Changes in the product prices, as well as changes in the discount rate, will impact the number of items sold.

In the model below, the item price is given in dollars.

Predicted number of items sold $=53,000-1,050**($item price$)+{0\mathrm{.}8}^{**}($discount rate$)$

When we control for the discount rate, whenever the item price increases $$0\mathrm{.}25,$ then the predicted number of units sold decreases units.