Question

The minimum of the graph of a quadratic function is located at (–1, 2). The point (2, 20) is also on the parabola. Which function represents the situation?

A) f(x) = (x + 1)2 + 2
B) f(x) = (x – 1)2 + 2
C) f(x) = 2(x + 1)2 + 2
D) f(x) = 2(x – 1)2 + 2

Answer 1

C

Explanation:

:V

Answer 2

so then tat is the vetex

y=a(x-h)²+k
(h,k) is veretx

(-1,2)
y=a(x-(-1))²+2
y=a(x+1)²+2

(2,20) is a point
sub
y=20 when x=2

20=a(2+1)²+2
20=a(3)²+2
20=9a+2
minus 2 both sides
18=9a
divide both sides by 9
2=a


y=2(x+1)²+2


C