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May 5th, 2015, 08:44 AM   #1
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Y intercept and gradient

3x=15+6y

goes to -6y=15-3x

then y= 15-3x/-6

I don't know can someone help please
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May 5th, 2015, 09:40 AM   #2
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We are given the line:

$\displaystyle 3x=15+6y$

The easiest way I know of the get the slope (gradient) and $y$-intercept at the same time is to write the line in slope-intercept form $y=mx+b$:

$\displaystyle y=\frac{1}{2}x-\frac{5}{2}$

Now it is easy to see that the $y$-intercept is at the point:

$\displaystyle (0,b)=\left(0,-\frac{5}{2}\right)$

and the slope is:

$\displaystyle m=\frac{1}{2}$
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