How do I find the b or y-intercept?

Mathematics
Tutor: None Selected Time limit: 1 Day

Nov 7th, 2015

Thank you for the opportunity to help you with your question!

I see your solution step is on the right path.  You are almost there in finding the y-intercept.  Now that you have y = 3x + b  , we have the variables x, y, and b to deal with.  But we can substitute for x and y from either of the given points (2, 5) or (4, 11).  Let us choose point (2, 5).   

x = 2 and y = 5,  

From y = 3x + b 

 so   5 = 3*2 + b

 5 = 6 + b, 

 therefore b = -1

Your y-intercept is -1

Please let me know if you need any clarification. I'm always happy to answer your questions.
Nov 7th, 2015

But to completely answer question #31.)  we say the linear equation is  y = 3x - 1  which contains the points (2, 5) and (4, 11).

Nov 7th, 2015

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Nov 7th, 2015
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Nov 7th, 2015
Dec 8th, 2016
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