Vivian L. answered 10/20/13
Tutor
3
(1)
Microsoft Word/Excel/Outlook, essay composition, math; I LOVE TO TEACH
Hi Tiffany;
The standard equation for lines is...
y=mx+b
m is slope
b is y-intercept--the point of y when x=0.
y=2x+b
Let's plug in the coordinate provided (6,15)...
15=2(6)+b
15=12+b
Let's subtract 12 from both sides...
-12+15=12+b-12
3=b
y=2x+3