Question
The number of hours studied, x, is compared to the grade received, y. x 4 2...
The number of hours studied, x, is compared to the grade received, y.
| x | 4 | 2 | 4 | 5 | 5 |
| y | 85 | 65 | 85 | 95 | 65 |
(a) Find the equation for the line of best fit. (Round your
intercept to two decimal places and your slope to three decimal
places.)
= + x
(b) Draw the line of best fit on the scatter diagram of these
data.
Homework Answers
Answer #1
a)
| x | y | xy | x2 | y2 |
| 4 | 85 | 340 | 16 | 7225 |
| 2 | 65 | 130 | 4 | 4225 |
| 4 | 85 | 340 | 16 | 7225 |
| 5 | 95 | 475 | 25 | 9025 |
| 5 | 65 | 325 | 25 | 4225 |
| ∑Xi=20 | ∑Yi=395 | ∑xiyi=1610 | ∑xi^2=86 | ∑Yi^2=31925 |
b)
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