# Rate Of Change And Slope

by Mary
(Mannford,oklahoma,Us)

(-2,-5)(7,8)Is the answer negative 3 over 21 which is -7?

### Comments for Rate Of Change And Slope

Average Rating     Dec 13, 2014 Rating     Alegbra by: Anonymous (6,-9) and (-3,-8). Find the slope of the line through the pair of points

 May 22, 2014 Rating     Good Job by: Anonymous Thanks

 Oct 09, 2010 Rating     Rate of Change and Slope by: Karin Hi Mary, If you want to find the slope of a line that passes through two points, you must use the equation: y(sub2) - y(sub1) / x(sub2) - x(sub1) (In this application, I cannot type subscripts. Therefore, when I write (sub2) that means the subscript 2.) Let's talk about what that formula means. You have two points. Point 1 is (-2, -5) and Point 2 is (7,8) When I use (sub1) this refers to point 1. When I use (sub2) this refers to point 2. So, basically we are going to subtract the y coordinate from the 2nd point and the y coordinate from the first point. We will do the same with the x coordinates and divide the two numbers. Take a look: (-2, -5) (7,8) Step 1: Subtract the y-coordinates from each point. 8 - (-5) = 13 Step 2: Subtract the x-coordinates from each point. 7 - (-2) = 9 Now we will divide. 13/9 This is the final answer. The slope or rate of change is 13/9. Take a look at the lesson on website. It may help you understand this concept. https://www.algebra-class.com/rate-of-change.html I hope this helps, Karin Need More Help With Your Algebra Studies?