Question

MEDAL!!
Write an equation of the line, in point-slope form, that passes through the two given points.
(-2,15) (9,-18)
y-2=-3(x-15)
y-2=-1/3(x+15)
y-15=-3(x+2)
y-15=-1/3(x+2)

Answer 1

a) find the slope
what do you get?

Answer 2

ok so
15-18
-2-9

Answer 3

oh no

Answer 4

-3/-11

Answer 5

careful here

Answer 6

\[\huge \frac{\color{red}{y_2}-\color{green}{y_1}}{(\color{blue}{x_2}-\color{orange}{x_1})}\]

Answer 7

\[\color{orange}{x_1}=\color{orange}{9}\]
\[\color{blue}{x_2}=\color{blue}{-2}\]
\[\color{green}{y_1}=\color{green}{15}\]
\[\color{red}{y_2}=\color{red}{-18}\]

Answer 8

remember the sign comes with the number

Answer 9

7/-3

Answer 10

so for example your numerator should be
\[15-(-18)\] not \[15-18\]

Answer 11

oh

Answer 12

and similarly, your denominator should be
\[-2-9\]

Answer 13

which is -7

Answer 14

\[-2-9\neq -7\]

Answer 15

\[2-9=-7\] but not \(-2-9\)

Answer 16

oh I'm confused now

Answer 17

i think the arithmetic is throwing you off
lets do the top first
what is
\[15-(-18)\]?

Answer 18

if that is not clear, let me know and i will tell you

Answer 19

33

Answer 20

yes ok good now on to the denominator

Answer 21

denominator is \[-2-9\]

Answer 22

ok

Answer 23

do you know what that is
hint: it is NOT \(-7\)

Answer 24

-11

Answer 25

33/-11

Answer 26

whew got it

Answer 27

right, and
\[\frac{33}{-11}=?\]

Answer 28

-1/3

Answer 29

hmmm no

Answer 30

sorry -3

Answer 31

right

Answer 32

a is the answer

Answer 33

oh no

Answer 34

\[y-y_1=m(x-x_1)\] you have \(m=-3\)

Answer 35

they are using the first point \((-2,15)\) for \((x_1,y_1)\)

Answer 36

c is the answer
thankyou so much

Answer 37

yw