Question

Write an equation in point-slope form of the line through the given points. Then write the equation in slope-intercept form.
#11. (4,0), (-2,1)
#12. (-3,-2), (5,3)
#13. (-5,1), (3,4)

Thats all they give you.
And YES I do know the Formulas:
Point-slope: y-y1=m(x-x1)
Slope-intercept: y=mx+b
Slope: m=y2-y1/x2-x1

Answer 1

first.., find the slope using the third formula that you write.., then use point-slope formula to find the equation..

Answer 2

m=y2-y1/x2-x1
(4, 0) (-2, 1)
m=1-0/-2-4
m=1/-6

m=y2-y1/x2-x1
(-3, -2), (5, 3)
m=3-(-2)/5-(-3)
m=5/8

m=y2-y1/x2-x1
(-5, 1) (3, 4)
m=4-1/3-(-5)
m=3/8

Answer 3

SLOPE= -0.16

Answer 4

@Butterfly16 Thats what I've done before, but then people come along, and tell me I'm wrong! ):

Answer 5

And why are you finding the slope 3 times?

Answer 6

because you have three questions and each question have equation... :)

Answer 7

oh, well I'm on #11.

Answer 8

y-y1=m(x-x1)
(4,0), (-2,1)
y-0=(1/-6)(x-4)
y-0= -0.16x+0.7
y=-0.16x+0.7

Yeah, I just finding the slope for all of them. :o)

Answer 9

Im so freaking confused.

Answer 10

now.., using the similar way.., you can solve questions #12 and #13
can you? :)

Answer 11

y1 and x1 just stand for the points. So (4, 0) is the point, so y1 is 0 and x1 is 4. That would the equation for the point-slope form for that set of points.

Answer 12

but you have to write it in point-slope form?!

Answer 13

Then, I guess you can just plug in the numbers into the point-slope form so it'd just be: y-0=(1/-6)(x-4)

Answer 14

but don't you have to do 2 equations because of (4,0) and (-2,1)

Answer 15

@Butterfly16 has write it in slope-intercept form
slope-intercept form is y = mx+ c ,

No.., points (4,0) and (-2,1) are on the same line.., so just choose one of them..

Answer 16

because like that?

Answer 17

Yip, the line would look like that. :o)

Answer 18

yup.., it's for the second line... :)

Answer 19

Awesome job! :o)

Answer 20

y-y1=m(x-x1)
y--2=1/2(x--3)
help

Answer 21

The points for number 12?

Answer 22

@erdog82
Kinda.

Answer 23

#12. i got that far but I'm stuck now.

Answer 24

y-y1=m(x-x1)
(-3, -2) (5, 3)

y-(-2)=(5/8)(x-(-3))
y+2=0.625x-1.875
y=0.625x-3.875

Answer 25

but y=mx+b

Answer 26

Yup, so for #12 it'd be y=0.625x-3.875