50 PTS PL HELP Which quadratic function is best represented by the graph?

A, f(x)=−x2+2x−3

B, f(x)=x2−2x−3

C. f(x)=x2−3

D f(x)=x2+2x−3
The graph of the quadratic function with a vertex at negative 1 comma negative 4 and zeros at negative 3 and 1

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.

If 25% of y is 30, what is 60% of y?