. Mrs. Khan makes cookies for the school bake sale. She uses the equation c = 0.75x to determine the cost, c, for x cookies. Whi
ch best represents the constant rate at which cookies are sold at the bake sale? A. 75 cookies per dollar B. (0,0), (3, 2.25), (6, 4.25), (8,6.5) c. 3/4 cookie per dollar D. (0,0), (2, 1.5) (5, 3.75), (7,5.25)
Since we know that the graph of our quadratic function has x-intercepts at (6,0) and (18,0), and are the zeroes of our quadratic. To find our quadratic we are going to factor each zero backwards and multiply them:
Now that we have our quadratic function, we are going to use the average formula: is the function evaluated at the <span>9th month </span> is the function evaluated at the 3rd month
We can conclude that the closest approximate average rate of change for Edna's profits from the 3rd month to the 9th month is: <span>B. −11.63 dollars per month.</span>