Which is true for the following equation? f(x) = −4x2 + 6x − 7 options: The graph opens up and the vertex is a maximum. The graph opens up and the vertex is a minimum. The graph opens down and the vertex is a maximum. The graph opens down and the vertex is a minimum.

first statement

Step-by-step explanation:

The graph opens up and the vertex is a maximum

repeat the question

step-by-step explanation:

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,