Question

What is the vertex of the graph of y = –1(x – 2)2 + 3?
Answer
A)(–2, 3)
B)(3, 2)
C)(3, –2)
D)(2, 3)

What are the x– and y–intercepts of the graph of y = x2 – 10x + 21?
Answer
A)x–intercepts: (–3, 0) and (–7, 0)
y–intercept: (0, –21)

B)x–intercepts: (3, 0) and (7, 0)
y–intercept: (0, –21)

C)x–intercepts: (–3, 0) and (–7, 0)
y–intercept: (0, 21)

D)x–intercepts: (7, 0) and (3, 0)
y–intercept: (0, 21)

Answer 1

D y = a(x-h)^2 + k (h,k) are the coordinates of the vertex

Answer 2

if x = 0 y =? , if y=0, x=?

Answer 3

Wait I don't understand the second one