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Brent0423
Group Title
Find the equation of the line with x − intercept (4,0) that is perpendicular to the line 3x − 8 y = 5 .
 2 years ago
 2 years ago
Brent0423 Group Title
Find the equation of the line with x − intercept (4,0) that is perpendicular to the line 3x − 8 y = 5 .
 2 years ago
 2 years ago

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Brent0423 Group TitleBest ResponseYou've already chosen the best response.1
set one of the variables equal to zero then find the other variable and repeat for x and y, then plug it into the equation for a line y=mx+b
 2 years ago

Brent0423 Group TitleBest ResponseYou've already chosen the best response.1
is this correct? please help me :)
 2 years ago

cshalvey Group TitleBest ResponseYou've already chosen the best response.4
Hey @Brent0423  so, to find perpendicular lines, you need to remember that the slope of the line is the *inverse* of the original line. So, you should put your original equation into slope intercept format (y=mx+b), and see if you can figure out the next step from there.
 2 years ago

Brent0423 Group TitleBest ResponseYou've already chosen the best response.1
Im confused which original equation?
 2 years ago

cshalvey Group TitleBest ResponseYou've already chosen the best response.4
Your 3x8y=5  You need to put that into the y=mx+b format
 2 years ago

Brent0423 Group TitleBest ResponseYou've already chosen the best response.1
Ok so in y=mx+b Y stands for the ycoord M stands for slope X stands for my xcoord B stands for what???
 2 years ago

cshalvey Group TitleBest ResponseYou've already chosen the best response.4
B stands for the 'yintercept' Basically, this is where the line crosses the yaxis (that's the vertical one)
 2 years ago

Brent0423 Group TitleBest ResponseYou've already chosen the best response.1
Please show me what it would be in y=mx+b form
 2 years ago

cshalvey Group TitleBest ResponseYou've already chosen the best response.4
No problem, so, let's look at your original equation: 3x8y=5 We want to put Y on its own side of the equation, so subtract 3X from both sides, this gives you: 8y = 3x + 5 Now, I need to divide by (8) in order to get y on its own, giving you: \[y=3/8 x + 5/8\]
 2 years ago

Brent0423 Group TitleBest ResponseYou've already chosen the best response.1
I got it!! Now what??
 2 years ago

cshalvey Group TitleBest ResponseYou've already chosen the best response.4
So, what's your slope?
 2 years ago

Brent0423 Group TitleBest ResponseYou've already chosen the best response.1
3/8. So the negative reciprocal is 8/3
 2 years ago

cshalvey Group TitleBest ResponseYou've already chosen the best response.4
^ Awesome!
 2 years ago

cshalvey Group TitleBest ResponseYou've already chosen the best response.4
K, so now we need to give the full equation of the line. You've already got the slope, now can you figure out how to get b? Use the points they give you and put them all into the slope intercept equation...
 2 years ago

Brent0423 Group TitleBest ResponseYou've already chosen the best response.1
yy1=m(xx1)
 2 years ago

Brent0423 Group TitleBest ResponseYou've already chosen the best response.1
y0=8/3(x4) y=8/3x+32/3
 2 years ago

cshalvey Group TitleBest ResponseYou've already chosen the best response.4
I do believe that's the correct answer  but I'd like to make sure with @Hero first. Good work though @Brent0423  way to stick in there :)
 2 years ago
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