Find a quadratic model for the set of values.

(–2, –20), (0, –4), (4, –20)
A. y = 4x2 + 4x + 2

B. y = 2x2 - 4x + 4

C. y = 4x2 - 2x - 4

D. y = -2x2 + 4x - 4

Question

Find a quadratic model for the set of values. 

(–2, –20), (0, –4), (4, –20) 
 A. y = 4x2 + 4x + 2  
 
 B. y = 2x2 - 4x + 4  
 
 C. y = 4x2 - 2x - 4  
 
 D. y = -2x2 + 4x - 4

anonymous · Answer

You are given two points on the curve and the y intercept

anonymous · Answer

i believe its D

anonymous · Answer

one way is to just plug in the coordinates given to you in the question and identify which equation will give you the correct y value for the plugged in x value

sirm3d · Answer

A and B are ruled out since the y-intercept is -4.

anonymous · Answer

@ethayer , I agree. Doing it that way makes is easy to determine that the answer is D