[4.02]What is the y−coordinate of the y−intercept of the line that passes through the points (−4, −4) and (4, 8)?

Question

anonymous · Answer

First you need to find the slope of the line and then use point slope form

anonymous · Answer

thank you

anonymous · Answer

You got it now? Or need me to work it out

anonymous · Answer

could you work out

anonymous · Answer

Yep. What did you get for the slope?

anonymous · Answer

2/3

anonymous · Answer

You should've got 12/8 which simplifies to 3/2...

Slope= (y2-y1)/(x2-x1) 
You got the top and bottom mixed up

anonymous · Answer

thank you i understand that part and see my error but how do i find the y coordinate

anonymous · Answer

Ok, use point slope form:

y-y1=m(x-x1)

pick whichever point you want for (x1, y1)
m=slope

plug those in

anonymous · Answer

y-8=3/2(x-4)
y-8 = 3/2x - 6
y = 3/2x + 2
2 is the y-coordinatae of the y-intercept