Question

How do i find the equation for (3,12) and (1,4)? http://prntscr.com/33ltsw

Answer 1

Apply the formula
\[
\frac{y-y_1}{x-x_1}=\frac{y_1-y_2}{x_1-x_2}
\]

Answer 2

im trying but i'm not to good at this is the answer 4

Answer 3

\[

\frac{y-12}{x-3}=\frac{12-4}{3-1}=4
\]

Answer 4

btw how would i know which is like y2 and like y1 ? does it make a difference

Answer 5

\[
y-12=4(x-3)=4 x-12\\
y=4 x
\]

Answer 6

No

Answer 7

so it doesnt matter which one i pick as y1 or y2?

Answer 8

The equation is y=4x

Answer 9

No

Answer 10

thanks for helping :) really helps

Answer 11

1. It doesn't make a difference because if it does result in being negative the rules for positive and negatives will regulate the answer

2. That's a bit unnecessary, you could've just used M = y2-y1/x2-x1
and y-y1=m(x-x1)

Answer 12

thanks to both of you guys :)

Answer 13

yw