Question

The line of best fit drawn on the plot shown is used to predict the number of tickets sold on a certain day. Use the two points shown on the line of best fit to calculate its slope to the nearest tenth.

Slope=

Answer 1

The two points are (1,30) and (7,55). Slope = the change in y/the change in x. Slope is -25/-6, which simplifies to 4.2.

Answer 2

(7,55)(1,30)
slope = (55-30) / (7-1)
slope = 25/6
slope = 4.2