SOLUTION: Write the slope-intercept equation for the line that passes through (2, -9) and (4, 1).

Algebra ->  Linear-equations -> SOLUTION: Write the slope-intercept equation for the line that passes through (2, -9) and (4, 1).       Log On


   

Question 427439: Write the slope-intercept equation for the line that passes through (2, -9) and (4, 1).
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

Using the standard slope-intercept form for an equation of a line y = mx + b 

 where m is the slope and b the y-intercept.  

Using the point-slope formula, m+=%28y%5B2%5D+-+y%5B1%5D%29%2F%28x%5B2%5D+-+x%5B1%5D%29

(2, -9) and 

(4, 1)   m = -10/-2 = 5

 y = 5x + b

 1 = 5*4 + b

-19 = b

 y = 5x-19