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4.4 exercises 10 and 12

4.4 exercises 10 and 12-example-1

1 Answer

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Answer:

10 - Answer: y = -5x + 7

11 - Answer: y = 3x/2 −8

Explanation:

10 -

The equation of the line in the slope-intercept form is y=4−5x.

The slope of the parallel line is the same: m=−5.

So, the equation of the parallel line is y=−5x+a.

To find a, we use the fact that the line should pass through the given point: 2=(−5)⋅(1)+a.

Thus, a=7.

Therefore, the equation of the line is y=7−5x.

11-

The equation of the line in the slope-intercept form is y=3x2+5.

The slope of the parallel line is the same: m=32.

So, the equation of the parallel line is y=3x2+a.

To find a, we use the fact that the line should pass through the given point: −5=(32)⋅(2)+a.

Thus, a=−8.

Therefore, the equation of the line is y=3x2−8.

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