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Through ( - 2, - 8); parallel to 3x + 2y = 5

asked
User Mjaggard
by
8.3k points

1 Answer

4 votes

Answer: 3x + 2y = -22

Solving that for y leads to y = (-3/2)x - 11

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Step-by-step explanation

Anything parallel to Ax+By = C is of the form Ax+By = D where C ≠ D.

If C = D, then the two lines would be identical, so that's why we need C and D to be different values.

So anything parallel to 3x+2y = 5 is of the form 3x+2y = D, where D ≠ 5.

To find the value of D, plug in the coordinates of the given point.

3x+2y = D

D = 3x+2y

D = 3*(-2)+2*(-8)

D = -6 - 16

D = -22

Therefore, 3x+2y = -22 is parallel to 3x+2y = 5, and this parallel line goes through (-2,-8)

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Optionally we could solve for y as shown here.

3x + 2y = -22

2y = -3x - 22

y = (-3x - 22)/2

y = (-3x)/2 - 22/2

y = (-3/2)x - 11

This equation has slope -3/2 and y intercept -11.

I used GeoGebra to confirm the answer is correct.

answered
User Mutant Bob
by
8.1k points

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