SOLUTION: find the slope if it exists, of the line containing the pair of points, (2,7) and (5,-2). The slope m=??

Algebra ->  Graphs -> SOLUTION: find the slope if it exists, of the line containing the pair of points, (2,7) and (5,-2). The slope m=??      Log On


   

Question 408407: find the slope if it exists, of the line containing the pair of points, (2,7) and (5,-2). The slope m=??
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

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

(2,7) and 

(5,-2) m = 9/-3  = -3

 



  y = -3x + b  |using ordered pair Pt(2,7) to solve for b

  7 = -6 + b    b = 13

 y = -3x + 13

line slants to the left as  m < 0

m = -3/1: as y increases/decreases by 3, x increases/decreases by 1 in opposite direction