Use the graph of the polynomial function f(x) = -43 + 6x to complete the following: 1) fis Select
on the intervals (-3, -2) and (0, 1).
2) fis Select
on the intervals (-4-3) (-2,0), and (1)
3) fis Select
on the intervals (-2.6, -1) and (0.6, )
4) fis on Select
on the intervals (-2,-2.6) and (-1,0.6)

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Step-by-step explanation:

1. These are intervals where the graph is above the x-axis, hence positive.

2. These are intervals where the graph is below the x-axis, hence negative.

3. The first interval is between the left peak and the valley, where the graph is decreasing. The second interval is right of the right peak, where the graph is also decreasing.

4. The first interval is left of the left peak, where the graph is increasing. The second interval is between the valley and the right peak, where the graph is also increasing.

a. the residual plot for model 1 has a random pattern and is a good fit for the data.