Question

The graph below shows the line of best fit for data collected on the number of cell phones and cell phone cases sold at a local electronics store on
twelve different days.
Number of Cell Phone Cases Sold
50
*
0 5 10 15 20 25 30 35 40 45
Number of Cell Phones Sold

Which of the following is the equation for the line of best fit?
A. y = 0.8x
B. y = 0.2x
C. y=0.5x
D. y = 0.25x

Answer 1

Answer:

C

Step-by-step explanation:

The equation of a line is given by

and

slope (m) is given by:

Where (x_1,y_1) are the first set of point in the line and (x_2,y_2) is the second set of point

Let's take 2 points arbitrarily. (0,0) & (25,20)

Let's plug it and find the equation:

Now

C is the correct answer.