Three Alg 2 Questions-Thanks

Hello, I just need help on these three questions, is all. Thanks so much!

 

Which quadratic equation fits the data in the table?

y=−x2−4x+1

y=x2−4x+1

y = x² + 4x + 1

y=x2−4x−1

x	y
0	1
1	−2
2	−3
3	−2
4	1
5	6
6	13

 

 

Which quadratic regression equation best fits the data set?

yˆ=179.246x2−20.213x+0.728

yˆ=0.728x2+20.213x+179.246

yˆ=0.728x2−20.213x+179.246

yˆ=0.728x2+0.564x+179.246

x	y
4	109
6	88
9	52
15	42
18	50
21	78
23	98

 

 

What is the quadratic regression equation for the data set?

yˆ=0.032x2−0.601x−0.255

yˆ=0.032x2+0.601x−0.255

yˆ=0.032x2−0.601

yˆ=0.032x2−0.601x

x	y
−6	4.56
−4	2.84
−2	0.45
0	0
2	−1.14
4	−2.1
6	−2.84