What is the slope-intercept form of this equation?

3x + 9y = 18
@Alexandra675

Question

What is the slope-intercept form of this equation?

 

3x + 9y = 18
@Alexandra675

btaylor · Answer

To put it into slope intercept form means solving for y.
so, how would you go about that?

anonymous · Answer

$$y=2-\frac{ x }{ 3 }$$

anonymous · Answer

y= 1/3x +2?

btaylor · Answer

@eflatt13 @Alexandra675 is right. Remember that you are subtracting the "x" term from both sides.

btaylor · Answer

But in terms of precise slope-intercept form, your form is correct (y=mx+b). so, I'd write it $y=-\frac{x}{3} + 2$ and it's perfect

anonymous · Answer

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mathstudent55 · Answer

First, divide both sides by 3 since every term is divisible by 3.

$3x + 9y = 18$

$x + 3y = 6$

Now subtract x from both sides:

$3y = -x + 6$

Now divide both sides by 3 to get y by itself:

$y = -\dfrac{1}{3}x + 2$

Now compare the answer with your choices and choose the correct one.