A few days ago

# how do i find the y intercept?

the two coordinates are (4,3) and (2,5) thus, the slope is -3/5. how do i get the y-intercept?

refer to this pic

http://i53.photobucket.com/albums/g60/idioticmonkey43/graph.jpg

AND SHOW AND EXPLAIN TO ME STEP BY STEP!!!

Top 3 Answers

A few days ago

Favorite Answer

You need to start with the correct slope. To find the slope you need to take y minus y over x minus x

5-3/2-4

meaning 2/-2 (reduced your slope is 1/-1)

to find the y intercept, you need to use the equation y=mx+b

(m is the slope, and b is the y intercept)

Use either of the (x,y) coordinates to find your y intercept:

3= -1*4+b

3= -4 +b

(add 4 to both sides)

7=b

OR

5= -1*2+b

5= -2+b

7=b

y-intercept is 7

0

A few days ago

Actually the slope is (5-3) over (2-4) = 2/-2 = -1

So the equation in y = mx + b form starts like y = -1x + b, where m = slope and b = y-intercept.

Now replace x and y with (4,3) getting 3 = -4 + b

Add 4 to both sides you get 7 = b

So the y-int. is 7

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A few days ago

oh! darn it…i just learned that last year..um i think it’s something like…oh i’m so sorry i totally forgot the form.

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