Which value if x in the interval pi over 2 < x < pi makes the line tangent to the function f(x) = square root of 2 + 2 cos x horizontal A. Pi over 4

B. Pi over 2

C. 2pi over 3

D. 3pi over 4

E. Pi

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