Question

The equation of a line is shown below.

y = - x - 7

What is the equation of a line which is parallel to this line and passes through (1, 79)?

Answer 1

y = -x + 80

y = x - 80

y = 7x - 80

y = -7x + 80

Answer 2

First of, two lines that are parallel to each other have the same slope

Answer 3

What's the slope of the line in the question?

Answer 4

ho did you do slope again x - x^1 = m(y - y^2) ?

Answer 5

The equation in the question is in slope-intercept form, i.e. y=mx+b where m is the slope and b is the y-intercept

Answer 6

ooh oops

Answer 7

So what's the slope?

Answer 8

wait whats y, y^1 and x, x^2

Answer 9

Your equation is not correct, it's y-y_1 = m(x-x_1)

Answer 10

Or written out: \(y-y_1=m(x-x_1)\)

Answer 11

sorry thats what i meant
but still what is y and y_1 and x and x_1

Answer 12

Where \((x_1,y_1)\) is a point on the line and \(m\) is the slope

Answer 13

All (x,y) that satisfy the equation will be on the line and all (x,y) on the line will satisfy the equation

Answer 14

y - 79 = m(x - 1)

Answer 15

y - 79 = mx - m
y - 79 = x
79 = x + y?

Answer 16

mx-m is not x

Answer 17

Actually, NOT using point-slope form will be faster

Answer 18

so what should we use?

Answer 19

slope-intercept form y=mx+b where m is the slope and b is the y-intercept

Answer 20

y = m79 + 1

Answer 21

Find the slope and the y-intercept in the equation "y=-x-7" first

Answer 22

how if theres no m

Answer 23

m is a constant

Answer 24

In this case m is -1

Answer 25

ooh

Answer 26

Find the option where m is also -1

Answer 27

Shortcuts for MC hehe

Answer 28

-1 * x - 7

Answer 29

If there's no m, m is still 1

Answer 30

x = 6?

Answer 31

Since they are parallel, you can find the option in which the equation also has m=-1

Answer 32

-x - 7

Answer 33

i really dont get this and gotta move along can you pls tell me the answer

Answer 34

Looks like you're not getting it, I apologize for confusing you

Answer 35

For example, in the equation y=2x+5

Answer 36

The slope is 2 and the y-intercept is 5

Answer 37

Get this?

Answer 38

ahh so the slope was -1?

Answer 39

Yep

Answer 40

So find the option where the slope is also -1 :)

Answer 41

A?

Answer 42

Exactly :)

Answer 43

omg thanks a lawt

Answer 44

no prawblem

Answer 45

hehe