## keri 3 years ago can someone please tell me how to find the slope of a graph?

• This Question is Open
1. colorful

what kind of graph? a line or a graph of some equation that curves?

2. keri

a line graph

3. colorful

I assume you are given a picture, or at least two points on the graph?

4. keri

yes something like this

5. colorful

I see 5 points on that graph pick any two of those points (it doesn't matter which) and list out the coordinates like so: (x,y) write that out and I will tell you where to go from there

6. keri

:( can u do it let me see it

7. keri

how do i find coordinates?

8. colorful

I will give you one: at x=1, notice that if you follow the blue dot above it to the left you get the y-coordinate which is 10

9. colorful

so that point on the upper-right corner is (1,10)

10. colorful

that means that when x=1, y=10 find another point using the same method

11. keri

x=-2,y=5 ?

12. colorful

careful, I think it's x=-2,y=-5 notice we are below the x-axis, and whenever that is the case y is negative

13. colorful

so now we have two points let's call them (x1,y1) and (x2,y2) it does not matter which is which (-2,-5) and (1,10) are our points

14. colorful

given two points on a line, (x1,y1) and (x2,y2) the slope is given by$slope={y_2-y_1\over x_2-x_1}$so just plug in the numbers into the formula and you get the slope