## anonymous one year ago Can someone please help me find the equation for this chart I've found the slope already just need the y-intercept.. Thanks :)

1. anonymous

|dw:1434826355134:dw|

2. anonymous

Someone please :( so far I got y=4x but idk how to find the y-intercept

3. anonymous

@Nixy

4. anonymous

???

5. anonymous

no you have it backwards m=slop B=y-intercept

6. anonymous

http://www.purplemath.com/modules/strtlneq.htm m=slope y=y-intercept

7. anonymous

haha

8. anonymous

b is not your slope and m is not the y intercept. you have that backwards.

9. anonymous

m is the slope and b is the y intercept

10. anonymous

little late nixy :3 but do you guys know how to find the y-intercept im having trouble

11. anonymous

f() = y The f() is a function but the so your points are (-7,-1) (1,1) (5.2) slope = m = $$\frac{Y_1-Y_2}{X_1-X_2}$$ slope =$$\frac{1}{4}$$ Now take any point and use the point slope form and plug in one of the points $$y - y_1 = m(x - x_1)$$ $$y - 1 = m(x - 1)$$ Are you still with me and see what I am doing?

12. anonymous

f() = y The f() is a function but the so your points are (-7,-1) (1,1) (5.2) slope = m = $$\frac{Y_1-Y_2}{X_1-X_2}$$ slope =$$\frac{1}{4}$$ Now take any point and use the point slope form and plug in one of the points $$y - y_1 = m(x - x_1)$$ $$y - 1 = m(x - 1)$$ $$y - 1 = \frac{1}{4}(x - 1)$$ Now lets get rid of the fraction. Times it all by 4. $$4(y - 1) = 4(\frac{1}{4}(x - 1))$$ $$4y - 4 = 4x - 4$$ Now put it in slope intercept form $$4y - 4 = 4x - 4$$ $$4y - 4+4 = 4x - 4 +4$$ $$4y = 4x$$ $$\frac{4y}{4} = \frac{4x}{4}$$ $$y = 4x$$ The y intercept is at 0

13. anonymous

Got it?