Question

I need help with slopes

Find the slope of the line that passes through the pair of points

5,4 9,1

Answer 1

is there like a easy way to do this problem or do you have to write out a graph and that ?

Answer 2

use the formula
\[m=(y _{2}-y _{1})/(x _{2}-x _{1})\]

Answer 3

oh yeah hold up

Answer 4

so 5y 9y 4x 9x

Answer 5

thats why i dont approve of blindly using a formula; if you dont know how to input the correct data, its useless :)

Answer 6

well u have to substitute the points in.

Answer 7

basically it is change in y divided by change in x

Answer 8

5, 4 9,1 , lets zero out one of the point
-5,-4
------
0 , 0

now, whatever we do toone point has to be done to the other sooo


5, 4 9, 1
-5,-4 -5, -4
----- -----
0 , 0 4 , -3 , slope is just y/x soo; -3/4 is the value we are after

Answer 9

srry beketso I have to give the point to amistre he explained it better with an steps

Answer 10

can you also help me on another one but let me first go over this one see if I under stand it

Answer 11

give it a shot; after a few dozen of these it becomes like second nature

Answer 12

you take your one y coordinate and subtract it from the other y coordinate .u do the same x coordinate .then u divide the y difference by the x difference

Answer 13

\[y=3/4 x-9\]

Answer 14

what about that one ?? and its 3/4 then x

Answer 15

not 4x

Answer 16

the form of that equation is called "slope-intercept" since it uses that values of the slope and yintercept to build the equation.

y = mx + b is the general setup, such that we can fill in the specifics, m=slope and b = y intercept

Answer 17

ok so this what it should be layed out to ?

Answer 18

y= 3/4 -9?

Answer 19

it should be compared with the general setup

y = m x + b
y = 3/4 x - 9

Answer 20

since the m position is for slope, the slope of the line is 3/4

Answer 21

yes so what do we need to find the slope intercept ?

Answer 22

the y srry

Answer 23

well directions say to find the slope and y-intercept

Answer 24

you want to know how to take the 2 points you gave at the start and form the slope intercept equation, right?

Answer 25

or, is this a new question?

Answer 26

this isn't a new ? Im still on the 3/4 ?

Answer 27

I'm trying to find out what the slope and y-intercept is of y=3/4 x-9

Answer 28

the form of that equation is called "slope-intercept" since it uses that values of the slope and yintercept to build the equation.

y = mx + b is the general setup, such that we can fill in the specifics, m=slope and b = y intercept

so, we should be compared with the general setup with the specific setup provided

y = m x + b
y = 3/4 x - 9

what is the value of m?
what is the value of b?

Answer 29

m = 3/4 and b = -9

Answer 30

very good

so slope is 3/4, and yintercept is -9

Answer 31

so wouldn't that be your answer ?

Answer 32

yes

Answer 33

ok so do you know substitution method ?