Question

What is the slope-intercept form of the function that contains the points (3, 1) and (2, 9)?

y = ___ x + ___


Thankiez!!!! ღ

Answer 1

@TheSmartOne
@StudyGurl14

Answer 2

We first need to find the slope! :)

\(\sf\Large Slope = \frac{\color{blue}{y_2}-\color{red}{y_1}}{\color{green}{x_2}-\color{purple}{x_1}}\)

Where the two points are in the form:

\(\sf\Large (\color{purple}{x_1},\color{red}{y_1})~and~(\color{green}{x_2},\color{blue}{y_2})\)

Answer 3

Sorry internet was laggy!
( 3,1 ) ღ ( 2,9 )

Answer 4

so those are the two points, now we plug them in. I even added colors to make it easier! :)

Answer 5

So....
y = 8x + -1
Right? ღ

Answer 6

slope is -8 not 8, so re-do the y-intercept :)

Answer 7

So, y = -8x + -1

Answer 8

nope

y = -8x + b

plug in x = 3, and y = 1 and solve for b

Answer 9

-2

Answer 10

how?

Answer 11

3-1=-2

Answer 12

your ignoring the -8

Answer 13

1 = -8(3) + b

Answer 14

1 = -8(3) + -2?

Answer 15

nope, w =on't work

what is 8 * 3 = ?

Answer 16

8*3=24

Answer 17

and so -8 * 3 = -24

and

1 = -24 + b

Answer 18

is the b -2?

Answer 19

noooooooooooo

1 = -24 + b

add 24 on both sides

what is 24 + 1 = ?

Answer 20

25

Answer 21

24+1=25
-24+24=0

Answer 22

so what does b = ?

Answer 23

25!

Answer 24

Correct! ღ

Great job! ღ

Answer 25

My Heart! ღ
xP

Answer 26

Quick Question tho...
Is 25 what comes after the 'x+'?
xP

Answer 27

@TheSmartOne

Answer 28

yes

so

y = -8x + 25

Answer 29

oooh, ok! Thankiez!!! ღ