22. Graph the following quadratic relation on the grid provided. Use 3 points, show your calculations in the space provided. ✔✔✔ y = (x+6)(x-2) ++ -10 -5 10 8 6 N T -10 5 10

The graph shows a quadratic function of the form R(t) = at2+bt+c, which represents the yearly revenue for a company, where R(t) is the revenue in year t.   a. Is the value of a positive, negative, or zero?  Explain. b. Write an expression in terms of a and b that represents the year t when the company had the least revenue. c. The company made the same yearly revenues in 2008 and 2018.  Estimate the year in which the company had the least revenue. d. Assume that the model is still valid today.  Are the yearly revenues currently increasing, decreasing, or constant?  Explain.

6. Determine the equation of the quadratic function with vertex (5, -1) and y-intercept of 6.

Convert the quadratic into standard form showing the steps to change forms. State the y-intercept and vertex. y = - 0.5(x – 5) + 2 19 20 21 22 23 DELL # $4 & 3 4 5 7 8. W y a f k