## anonymous 4 years ago can someone please tell me how to find the slope of a graph?

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1. anonymous

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

2. anonymous

a line graph

3. anonymous

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

4. anonymous

yes something like this

5. anonymous

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. anonymous

:( can u do it let me see it

7. anonymous

how do i find coordinates?

8. anonymous

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. anonymous

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

10. anonymous

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

11. anonymous

x=-2,y=5 ?

12. anonymous

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. anonymous

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. anonymous

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