Write the equation of a line with slope m = 3 and including point (3, 5) in slope-intercept form.

Question

ajprincess · Answer

Let the equation of the line be 
y=mx+c
To find c
plug in the values y=5, x=3 and m=3 in y=mx+c.
 Can u do it @flyinglikeabird??

anonymous · Answer

c is -1?

anonymous · Answer

err -4

anonymous · Answer

3x3 = 9 + -4 = 5

ajprincess · Answer

yup c=-4.
So ur equation becomes
y=3x-4.
Getting it?

anonymous · Answer

I never really understand algebra. It all seems like made up crap. I see what you did, but what is c?

ajprincess · Answer

c is y-intercept

anonymous · Answer

Y=mx+b
5=3(3)+b
5=9+b 
B=4

ajprincess · Answer

@ninab731 
b=-4
5=9+b
5-9=b
-4=b

anonymous · Answer

Ahh, okay. It all makes sense how you did it, don't understand why it is that way...

ajprincess · Answer

y=mx+c is the general slope-intercept form

anonymous · Answer

I get it, just feels like I am missing something. But thanks for your help!

ajprincess · Answer

yw:) if anythng is nt clear plz ask