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Mathematics 18 Online
OpenStudy (anonymous):

HELP! NEED HELP!

OpenStudy (anonymous):

Write the equation of the line that is perpendicular to the line y = 2x + 2 and passes through the point (6, 3).

OpenStudy (anonymous):

Write the equation of the line that is parallel to the line 4x − 3y = −12 and passes through the point (−3, 4).

OpenStudy (allank):

Hint: The product of the gradients of perpendicular lines = -1

OpenStudy (anonymous):

what are gradients?

OpenStudy (allank):

The gradient of a line y=mx+c is m.

OpenStudy (allank):

So first, identify the gradient of the line y = 2x + 2 which is....?

OpenStudy (anonymous):

Please just answers for these two

OpenStudy (anonymous):

2

OpenStudy (allank):

Correct. So the gradient of the unknown line is....?

OpenStudy (anonymous):

1/2?

OpenStudy (anonymous):

or 2 again?

OpenStudy (anonymous):

@mukushla PLease answer or dont stare at it for 20 mins. I need help not a stalker. :D

OpenStudy (allank):

Sorry for late response @Brandon_Sirota. Server issues. You were close. The gradient of the unknown line is -1/2. Since 2*-1/2=-1. Now given the gradient -1/2, and a point (6,3) through which the line passes. I believe you can get the equation of the line. Use the same methodology for the second question, the only difference being that the gradients of parallel lines are equal. I hope that helps.

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