## anonymous 5 years ago Find the standard form of the equation of the line that passes through the points (-1,-1) and (3,4)

1. anonymous

Did you find the slope of the line?

2. anonymous

no

3. anonymous

Do you know the formula for the slope?

4. anonymous

x1-y2 X2 -Y2 ?

5. anonymous

y1

6. anonymous

Not quite. $Slope =\frac{\text{Change in y}}{\text{Change in x}} = \frac{y_2-y_1}{x_2-x_1}$

7. anonymous

so the slope is 3/5?

8. anonymous

5/4

9. anonymous

$\frac{4-(-1)}{3-(-1)}$

10. anonymous

so then what is my standard form equation?

11. anonymous

Once you have the slope, you can plug that into the point slope formula. $y-y_1 = M(x-x_1)$ Where M is the slope.

12. anonymous

And $$x_1,y_1$$ are the x and y values of a point on the line (you can pick either point for this)

13. anonymous

i give up

14. anonymous

Why? You were doing fine so far.

15. anonymous

You found M = 5/4

16. anonymous

You are given the x and y values for 2 points, just pick one and plug them in.