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otakugirl
 3 years ago
Select the equations that are parallel and perpendicular to y =1/4x + 7 and that pass through the point (8, 9).
a) parallel: y =1/4x  11
perpendicular: y = 4x + 23
b) parallel: y = 4x + 11
perpendicular: y =1/4 x  4
c)parallel: y = 4x  7
perpendicular: y =1/4x  7
d)parallel: y =1/4x + 11
perpendicular: y = 4x  23
otakugirl
 3 years ago
Select the equations that are parallel and perpendicular to y =1/4x + 7 and that pass through the point (8, 9). a) parallel: y =1/4x  11 perpendicular: y = 4x + 23 b) parallel: y = 4x + 11 perpendicular: y =1/4 x  4 c)parallel: y = 4x  7 perpendicular: y =1/4x  7 d)parallel: y =1/4x + 11 perpendicular: y = 4x  23

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aroub
 3 years ago
Best ResponseYou've already chosen the best response.1Oh my x_x This what I'm going to do, I'll explain to you the first one and you do the rest and I'll check them, deal? :)

aroub
 3 years ago
Best ResponseYou've already chosen the best response.1Do you know what does parallel and perpendicular mean here?

otakugirl
 3 years ago
Best ResponseYou've already chosen the best response.1a little bit not so much :/

aroub
 3 years ago
Best ResponseYou've already chosen the best response.1It's okay, what do you know?

otakugirl
 3 years ago
Best ResponseYou've already chosen the best response.1okay i know that perpendicular lines intersect at a 90 degree angle and parallel lines dont intersect

aroub
 3 years ago
Best ResponseYou've already chosen the best response.1Okay, the meaning in here for both is all about the slope. Parallel means that they have the same slope while in perpendicular the slope is the opposite reciprocal of the original slope.

aroub
 3 years ago
Best ResponseYou've already chosen the best response.1For a) parallel: y =1/4x  11 ; (8,9) slope= 1/4 ; x=8 , y=9 ( I got x and y from (8,9) ) To solve such problem you will have to use the slope intercept form, which is: y=mx+b, where m is the slope. Now all you got to do is substitute to find b. => 9=1/4(8)+b 9=2+b 11=b since we found" b" we can now find the new equation which is parallel to the original equation. How? By using the slope intercept form, again! y=mx+b, you always leave the x and y! Just substitute for m and b. => y=1/4x+11 Got it?

otakugirl
 3 years ago
Best ResponseYou've already chosen the best response.1yes thank you so much :)

aroub
 3 years ago
Best ResponseYou've already chosen the best response.1Can you do the perpendicular now? They're the exact same steps but with different slopes of course. Remember the slope of the perpendicular is the opposite reciprocal.

otakugirl
 3 years ago
Best ResponseYou've already chosen the best response.1yes now i can do it and i agree with 4
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