Im so confused
8.11
an expression is shown below:
f(x)=-16x^2+60x+16

part a: what are the x intercepts of the graph of f(x)? show your work. (2points)

part b: is the vertex of the graph of f(x) going to be a maximum of a minimum? what are the coordinates of the vertex? justifiy your answers and show your work.(3 points)

part c: what are the steps you would use to graph f(x)? justifiy that you can use the answers obtained in part a and part b to draw the graph (5 points)

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)