I dont understand this, can i get some help please

When we want to find the roots of a one-variable function, we look for where its graph intersects the x-axis. In this case, the graph intersects the x-axis at

The vertex of a parabola is the highest or lowest point on it, depending on whether the leading coefficient of the quadratic function is negative or positive. In this case, we see that the lowest point is

For the y-intercept, just look for where the graph intersects the y-axis; in this case, that point is

Using this information, the vertex-form equation of the parabola is so the factors are two copies of In this case, the value of in the equation was conveniently 1; if that's not the case, you'll want to plug in to solve for the value of a that gives the correct y-intercept.

Does that help clear things up?

the answers are in the images, i received 100% on this assignment. hope this !

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step-by-step explanation:

u take $75 minus $60.the anwer/original($75)multiply by 100