Betty's Blankets is a store that just recently started to carry heated blankets. The owner, Betty, wants to find out whether or not there is a relationship between the temperature outside and the number of blankets sold. This way she can have the correct amount of inventory for whatever the weather is like. Betty recorded sales data from her main competitor and recorded it. Equation: y = -30.27x + 965.04

What does the slope (-30.27) mean in this situation? ​