First, find the slope (m):
Apply the formula:
[tex]m=\frac{y2-y1}{x2-x1}[/tex]Given the points:
(x1,y1) = (-8,1)
(x2,y2)= (-2.4)
m= 4-1 / -2-(-8) = 3 / 6 = 1/2
Slope intercept form:
y=mx+b
Where:
m= slope = 1/2
b= y-intercept
So far:
y = 1/2x + b
Replace (x,y) with any point , for example (-8,1), and solve for b
1 = 1/2 (-8) + b
1 = -4 + b
1+4= b
b= 5
Slope intercept form:
y= 1/2x + 5
point slope form:
y-y1 = m ( x- x1 )
y- 1 = m ( x + 8 )
