Do these side lengths make a right triangle? 5, 12, 13

Answer question above and explain each step : )

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

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