Jessica believes that the number of cups of coffee that she sells daily at her coffee shop depends primarily on the temperature outside. The five days of data that she’s collected are shown in the table below:

a. Show the data in a scatter diagram and use the least squares criterion to find the slope (b) and the intercept (a) for the best fitting line here. Sketch the least squares line in your scatter diagram. 

b. Use the line to predict daily sales when the high temperature is 55 degrees. 

c. According to the line you’ve fit, each one degree increase in high temperature can be associated with a___ cup decrease in sales.

Transcribed Image Text:

High Temp (Fo) 50 70 Cups Sold 350 210 80 90 100