Question

What are the key points on the graph: y=x2−2x−120
?(4 points)
Vertex: (
,
)

y-intercept: remember to use x,y: (
,
)

x-intercepts: (
,
) and (
,
​​​​​​​)

Answer 1

y = x^2 − 2x − 120

Vertex: (1, −121)

y-intercept: (0, −120)

x-intercepts: (12, 0) and (−10, 0)

(Work: vertex x = −b/(2a) = 1, y = 1−2−120 = −121; x-intercepts from x^2−2x−120=(x−12)(x+10)=0.)