The slope-intercept form:
[tex]y=mx+b[/tex]
m - slope
b - y-intercept
We have the slope m = 2 → [tex]y=2x+b[/tex]
and point (6, 9). Substitute:
[tex]9=2(6)+b[/tex]
[tex]9=12+b[/tex] sunbract 12 from both sides
[tex]-3=b\to b=-3[/tex]
Answer: y = 2x - 3
