Question

What is the slope-intercept form of the function described by this table?

x 1 2 3 4
y 1 −2 −5 −8


y = _ x +_

Answer 1

@dagrothus

Answer 2

@iambatman

Answer 3

@dagrothus

Answer 4

@Legends

Answer 5

@AlexandervonHumboldt2

Answer 6

@Jhannybean

Answer 7

@peterg2001

Answer 8

plz help

Answer 9

sorry cant help

@AlexandervonHumboldt2 @EclipsedStar

Answer 10

@EclipsedStar

Answer 11

@AlexandervonHumboldt2

Answer 12

@matt101

Answer 13

thx @matt101

Answer 14

You need to solve this in two steps. First find the slope (first blank), then find the y-intercept (second blank).

To find the slope, choose any two points from the ones you gave. To find the slope:

\[Slope = {x_2-x_1 \over y_2-y_1}\]
For the y-intercept: Once you have the slope, choose any one point from the ones you gave, and solve for the y-intercept by subbing in the slope and the x and y values from that point!

Let me know what you get!

Answer 15

-3

Answer 16

i thought it was y2-y1/x2-x1. lol

Answer 17

That's the right slope! Sorry, I just realized I reversed the x's and y's in the slope equation. It's rise/run, so it should read:

\[Slope={y_2-y_1 \over x_2-x_1}\]
Now that you have the slope, you can use it and another point to find the y-intercept.

Answer 18

ohh.

Answer 19

Yeah I just noticed my mistake - you're absolutely right.

Answer 20

which point?

Answer 21

which point?

Answer 22

If we call slope m, your equation becomes y = mx + ?

We're trying to solve for the ? which is the y-intercept. We have m, and we can take the x and y from any point on the line. Use that to find ?

Answer 23

It can be any of the points you listed above, it won't change your answer!

Answer 24

-2-1?

Answer 25

would the other answer be 1? @matt101

Answer 26

nv i got it thx