## nagdy1 Group Title What is an equation for the line that passes through points (–1, –4) and (1, 4)? Write the equation in slope-intercept form. PLEASE SHOW STEP BY STEP one year ago one year ago

1. philo1234 Group Title

First find the slope using the 2 point can you do that?

2. nagdy1 Group Title

yes

3. philo1234 Group Title

What did you get?

4. nagdy1 Group Title

zero slope or unidentified slop

5. philo1234 Group Title

$slope = \frac{ 4-(-4) }{ 1-(-1) }$

6. nagdy1 Group Title

that's all

7. philo1234 Group Title

Nope you then need to use this slope and one of the points to find the equation. plug in this formula y-y1=m(x-x1) (x1,y1) is taken from one of the points

8. nagdy1 Group Title

ok then what

9. nagdy1 Group Title

i dont get my head is about to explode they gave me this question out of no where

10. nagdy1 Group Title

can u show me step by step

11. philo1234 Group Title

So what do you have so far? m (slope)=4, choose the point (1,4), x1=1, y1=4 you should have y-4=4(x-1)

12. nagdy1 Group Title

can you please just put all the steps on one reply like: 1. 2. 3. 4.

13. philo1234 Group Title

Step 1: Find the slope(m) = (4-(-4))/(1-(-1)) = 8/2=4

14. nagdy1 Group Title

ok step 2

15. philo1234 Group Title

Step 2: Use point slope form to get equation: y-y1=m(x-x1), m=4, point (1,4) where x1=1, y1=4 In the point-slope equation: y-1=4(x-4) Do u understand these step so far?

16. nagdy1 Group Title

yes

17. philo1234 Group Title

Step 3: Slope-intercept form is y=mx+b So we have y-1=4(x-4) Solve for y (that is put y by itself on one side).

18. philo1234 Group Title

If you did that correctly you should get: y=4x-15

19. nagdy1 Group Title

ohhh thanks man

20. nagdy1 Group Title

ill give u a medal

21. philo1234 Group Title

Sure no problem.