SOLUTION: Find an equation of the line containing the given pair of points. (4,1) and (12,8) What is the equation of the line? y = ?

Algebra ->  Coordinate-system -> SOLUTION: Find an equation of the line containing the given pair of points. (4,1) and (12,8) What is the equation of the line? y = ?      Log On


   

Question 249605: Find an equation of the line containing the given pair of points.
(4,1) and (12,8)
What is the equation of the line?
y = ?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
(4,1) and (12,8)
Y=mX+b
Slope=(y2-y1)/(x2-x1)=(8-1)/(12-4)=7/8 is the slope
1=7*4/8+b
1=28/8+b
b=1-28/8
b=8/8-28/8
b=-20/8=-2.5 ans. for the y intercept.
y=7x/8-2.5
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+7x%2F8+-2.5%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, 7x/8 -2.5).