Question

Create a graph; then answer the following question.

What are the key points on the graph of y=x2−8x
? Name the vertex, x-intercept(s), and y-intercept.

(1 point)
Responses

x-intercepts: (0,0)
(8,0)


y-intercept: (0,0)


vertex: (4,−16)


x -intercepts: left parenthesis 0 comma 0 right parenthesis left parenthesis 8 comma 0 right parenthesis y -intercept: left parenthesis 0 comma 0 right parenthesis vertex: left parenthesis 4 comma negative 16 right parenthesis

x-intercept: (4,−16)


y-intercept: (0,0)


vertex: (8,0)


x -intercept: left parenthesis 4 comma negative 16 right parenthesis y -intercept: left parenthesis 0 comma 0 right parenthesis vertex: left parenthesis 8 comma 0 right parenthesis

x-intercepts: (0,0)
(0,8)


vertex: (4,−16)

Answer 1

y = x^2 − 8x = x(x − 8)

- x‑intercepts: (0, 0) and (8, 0) (solve x(x−8)=0)
- y‑intercept: (0, 0) (y when x=0)
- vertex: (4, −16) (complete the square: (x−4)^2 −16)

Axis of symmetry: x = 4.