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May 4th, 2015, 05:00 AM  #1 
Senior Member Joined: Jan 2015 From: London Posts: 108 Thanks: 2  Help find the gradient and the yintercept
find the gradient and the yintercept of this please y=4x6 Thanks I don't know how to do it 
May 4th, 2015, 05:34 AM  #2 
Senior Member Joined: Jan 2015 From: London Posts: 108 Thanks: 2 
I figured out how to do it

May 5th, 2015, 01:56 AM  #3 
Senior Member Joined: Apr 2014 From: Glasgow Posts: 2,142 Thanks: 726 Math Focus: Physics, mathematical modelling, numerical and computational solutions  
May 6th, 2015, 01:47 PM  #4 
Math Team Joined: Jan 2015 From: Alabama Posts: 3,264 Thanks: 902 
I would imagine any textbook that uses "y= ax+ b" as a standard form (the "slopeintercept" form) would also say that "a" is the gradient and "b" is the yintercept.

May 6th, 2015, 06:49 PM  #5 
Senior Member Joined: Nov 2010 From: Indonesia Posts: 2,001 Thanks: 132 Math Focus: Trigonometry  Not quite. In my country, they do say that "a" is the gradient but never say that "b" is the yintercept, making students waste their time substituting x = 0 to the equation.

May 6th, 2015, 08:18 PM  #6 
Newbie Joined: May 2015 From: India Posts: 14 Thanks: 0 Math Focus: Number Theory  Which country do you belong to?
Last edited by skipjack; May 6th, 2015 at 10:08 PM. 
May 7th, 2015, 05:12 AM  #7 
Math Team Joined: Jan 2015 From: Alabama Posts: 3,264 Thanks: 902 
Surely it doesn't waste a great deal of time to multiply by 0! And after the first time doing that, you would know the yintercept of y= ax+ b is b. All your country is doing is helping the students discover it for themselves.

May 7th, 2015, 07:19 PM  #8 
Senior Member Joined: Nov 2010 From: Indonesia Posts: 2,001 Thanks: 132 Math Focus: Trigonometry  Indonesia. Well, actually I'm glad they didn't spoil the students by just doing that. Last edited by Monox D. IFly; May 7th, 2015 at 07:22 PM. 

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