Find the equation that best fits the graphed data.
y
14
12-
10
10
-2
8
6
4
21
Oy = x² + 2x + 4
-
Oy = x² + 4x - 1
y=-3x² + 15x
-
y= x² + 4x + 2
5
2
4
+6
8
10 12 14
4
X

Find the equation that best fits the graphed data y 14 12 10 10 2 8 6 4 21 Oy x 2x 4 Oy x 4x 1 y3x 15x y x 4x 2 5 2 4 6 8 10 12 14 4 X class=

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Answer:

x y

0 1.4

1 6

2 8

3 11.5

4 13

5 13.3

6 13.8

7 14

8 13

9 11

10 7.5

11 6

12 2.5

Plot these points on the graphing calculator (some of the y-coordinates may be approximate). Then generate a quadratic regression equation.

y = -.336x² + 4.048x + 1.8

The closest equation is D.

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