Quadratic Function

Question

 Which of the following table of values is a Quadratic Function?

​​​a. ​​​​​​​

X	-2	-1	0	1	2
F(x)	-3	-1	1	3	5

​​​b.

X	-2	-1	0	1	2
F(x)	9	3	1	3	9

​​​c.

X	-2	-1	0	1	2
F(x)	-4	-2	0	2	4

​​d. 

X	-2	-1	0	1	2
F(x)	-2	-1	0	1	2

 

Answer 1

b) has points on a quadratic function's graph,

an upward opening parabola with axis of symmetry x=0,

vertex = minimum point = V(0,1)

y=f(x) = 2x^2 +1

c) is linear, f(x)=2x

d) is linear, f(x)=x, a 45 degree line through the origin

a) is linear, f(x) =2x+1

it helps to plot the points