Question

Write the equation of the line which passes through (5, –2) and is parallel to x = 4.

Answer 1

use formula y=mx+b

Answer 2

wud -2 be the b?

Answer 3

and 5 be mx

Answer 4

you have point (5, -2) and slope = 4
then to find b substitute the points
y = mx + b
-2=(4)(5) + b
-2 = 20 + b can you tell me what is b

Answer 5

Now just make sure when you said x = 4 are you saying m = 4, or slope = 4

Answer 6

wub b = -22

Answer 7

correct so now you have your m and your b that is what you need to write the equation of the line
y = 4x -22

Answer 8

so y=4x-22 thts my finished equation?

Answer 9

Write the equation of the line which passes through (2, 1) and is perpendicular to x = –2.

Answer 10

this is a different one wud i still be using y =mx+b

Answer 11

to be perpendicular the slope needs to be opposite reciprocal, what is the opposite reciprocal of -2 ??

Answer 12

positive 2

Answer 13

opposite is positive 2, but opposite reciprocal = positive 1/2

Answer 14

so the slope = 1/2, now find b using the formula y = mx + b,
where m = 1/2, and (x,y) = points (2,1)

Answer 15

so if m was 2 it wud be 1? Since half

Answer 16

if m would have been 2, the opposite reciprocal would have been -1/2

Answer 17

negative 2?

Answer 18

you have y = mx + b, so you have
1 = (1/2)(2) + b
1 = 1 + b, so b = 1-1, b = 0

Answer 19

so the equation of the line is written like this
y = 1/2x

Answer 20

but wudnt there be more to the equation then just that?

Answer 21

when a question ask you "What is the equation of the line", is asking to put the equation on the form y = mx + b

all you need on this equation is the value of m and b, just because (x,y) represents any points on that line, and a line have many, many points.

Answer 22

oh alright math is my worst subject -_- its confusing me takes me a lil to catch on

Answer 23

that is ok, math is all about practice

Answer 24

Write the equation of the line which passes through (–4, 2) and is parallel to y = –x + 6 in slope-intercept form.
Now this one is the slope intercept

Answer 25

the y=mx+b, is the equation of the line in slope intercept form

Answer 26

so you have y = -x+6
what is the slope or m on this equation ??

Answer 27

-4?

Answer 28

when u have (-4,2) wud the first one represent m or the second one

Answer 29

the points are (-4,2), that have nothing to do with slope
on the equation y = mx + b
y is a point
x is a point
m is the SLOPE
b is the y - int

Answer 30

ok so how do u find slope

Answer 31

ok, is giving you the equation y = -x + 6, what number is on the m position

Answer 32

-x

Answer 33

right but x is a point (-) is the slope which is the same as -1

Answer 34

now that you now the slope = -1, to find the equation of the line which passes through (–4, 2) and is parallel to the equation
when they ask for "PARALLEL" it means the slope would be the same

Answer 35

so all you need to find now is the value of b, so you have
M = -1
X = -4
Y = 2
equation y = mx + b, what is the value of b

Answer 36

ok i got 2=-1(4) tht became -4 but still tht didnt give b

Answer 37

so then i wud have 2=-4

Answer 38

wud i divide 2 on each side to find b

Answer 39

you have 2 = (-1)(-4) + b

Answer 40

solve for b

Answer 41

6=b

Answer 42

2 = 4 + b
-4 -4
----------
-2 = b

Answer 43

b = -2

Answer 44

so now you have the m and the b
m = -1
b = -2

Answer 45

how in the world did i get 6 -_-

Answer 46

so what is the equation

Answer 47

y=-1+(-2)

Answer 48

or wud it just be y=-1-2

Answer 49

-1+2*

Answer 50

remember on the equation you always need to have an (X) and a (Y)
so you write it as
y = -x -2 or y = -1x - 2

Answer 51

ohhh okkk so cant forget the "x"

Answer 52

think you are a little confuse, you don't need a value for y, you only need the "equation of the line" which is a formula written as y = mx + b, where m = slope and b = y-int

Answer 53

ohhh okkkk alright with math its remembering all these formulas haha

Answer 54

I know it is very confusing, but practice practice practice

Answer 55

got to go

Answer 56

Thank u!!! :)