Question

What are the key points on the graph of y=x^2−16x+48
? Name the vertex, x-intercepts (both larger and smaller x-intercepts), and y-intercept.(2 points)

Answer 1

Vertex: (8, −16) (since x = -b/2a = 8, y = 8^2 − 16·8 + 48 = −16)

x-intercepts: (4, 0) and (12, 0) (smaller: (4,0); larger: (12,0))

y-intercept: (0, 48)