Question 164865
The first thing you need to know is what slope intercept form is.
So slope intercept form is:  y=mx+b
where (x,y) is a given point; m=slope; b=the y-intercept
So, substitute your values into the equation and you get
 y =  m  x +b
(3)=(-6)(3)+b
now solve for b
3=-18+b
add 18 to both sides and you get
21=b
Now that you know the value of b you are able to plug this into the slope-intercept formula
{{{y=-6x+21}}}
you will need to know how to do this problem throughout your education so make sure you understand this very well.
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