Help! Equation of a Straight line. (1 Viewer)

ticklea

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Find the gradient of the straight line perpendicular to the line with x intercept 3 and y- intercept2.

Preliminary Question. Answer:1.5

Please show working out :D
 

h3ll h0und

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xintercept = (3, 0 )

yintercept = (0,2)

so gradient of the line = 2/-3

m1 x m2 = -1 (for perpendicular line)

2/-3 x m2 = -1

therefore, m2 = 3/2 = 1.5
 

ticklea

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Agreed. 2U gets much harder than this. This is something like year 9/10 standard.
Nope. I did 9 and 10 Advanced 5.3 and perpendicular distance was not a topic nor was it covered. Plus this is a question from a pre practice sheet before we actually start the topic.
 
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Nope. I did 9 and 10 Advanced 5.3 and perpendicular distance was not a topic nor was it covered. Plus this is a question from a pre practice sheet before we actually start the topic.
Your question was about perpendicular lines, not perpendicular distance. It would have been covered in the Geometry topic in Year 9.
 
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ticklea

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Your point being?

I was asking one question... thats all and hoping to get an answer, not opinions of wat level of maths I should take. If you dont have the decency to answer then dont tell me your opinions because thats not what I was asking for.
 
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Your point being?

I was asking one question... thats all and hoping to get an answer, not opinions of wat level of maths I should take. If you dont have the decency to answer then dont tell me your opinions because thats not what I was asking for.
Telling you to drop to General wasn't advice, I said that to insult you.
 

Matt2233

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IIT: Douche bags

Seriously, as far as you know this guy had a bad teacher who didn't cover perpendicular lines in year 9/10 and is learning it for the first time by himself.

You shouldn't be giving advice/insulting people when you don't know their situation.
 

dan2452

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^^^Most of the previous posters are douchebags.

Maybe revise over a textbook for this area if you don't understand it.

The basic formula for a straight line is

y= mx + b

where m is the gradient, which can be calculated as (y2-y1)divided by (x2-x1) or rise over run

b is the intercept

Then just use basic rearranging/plotting to figure out gradient.
 

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