Question

Write an equation in slope intercept form of the line that passes through (4, 1) and (5, -1).
A. y = -4x + 1
B. y = -1/2 x + 9
C. y = 4x + 1
D. y = -2x + 9

Answer 1

Use the slope formula:
\[\large \frac{ y_2-y_1 }{ x_2-x_1 }\]

Answer 2

Then input your values into the point-slope form and solve for y ( to get your slope-intercept form).
\[\large y-y_1 = m(x-x_1)\]

Answer 3

@shamil98 I did that and got y= 0x +1.. that's not an answer so....

Answer 4

What is -1 - 1 ?

Answer 5

@taylorwristshot

Answer 6

@tHe_FiZiCx99 -2

Answer 7

thats your m (slope) so now plug in your value's for

y-y1=m(x-x1)

Answer 8

@tHe_FiZiCx99 So that would be 4-1= -2 (5- -1) right?

Answer 9

No, Y - Y1=m(X-X1
Just plug in for: Y1, M and X1

Answer 10

@tHe_FiZiCx99 Oh okay.. then it would be Y-4= -2 (x-5)

Answer 11

No, ordered pairs are (x,y) try again

Answer 12

@tHe_FiZiCx99 Im so confused now...

Answer 13

Ok, ordered pairs are shown as (x,y) you have (4,1) where 4 is your x and y is your 1

Answer 14

Then you have (5,-1) again, where x is the 5 and -1 is the y

Answer 15

Understand?

Answer 16

So again, what is : y-y1=m(x-x1)

Answer 17

@taylorwristshot

Answer 18

@tHe_FiZiCx99 I guess.. Then wouldn't it be 1-y1= -2 (4-x1)?

Answer 19

No, the formula is : y-1=-2(x-4)

Answer 20

I only plugged in the y1 and x1

Answer 21

@tHe_FiZiCx99 Oh.. alright.. but that's not even close to being an answer...

Answer 22

Solve it,

Answer 23

So what'd you get?

Answer 24

I'm gonna assume you solved it :)
y-1=-2(x-4)
y-1=-2x - 8
+1 + 1

y = -2x + 9

Answer 25

@tHe_FiZiCx99 YES! That's what I got. Sorry for the late reply, was busy. Thank you!!!

Answer 26

Yw.