To find the vertex, What must you do with the value you get from the formula −b/2a the options are
A. That value is your vertex
B. I have no idea, I haven't listened all week
C. Plug it into original equation
D. Plug it into quadratic formula

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