Question

Which equation has a graph that is perpendicular to the graph of 4x - 2y = 1?
a. y = -2x + 8

b. 2x + 4y = -1

c. y = 2/3x - 2

d. 6x -3y = 9

Answer 1

First, use algebra to change
4x - 2y = 1

into
y = mx + b
form

can you do that ?

Answer 2

-2y=-4x+1

Answer 3

yes, so far, so good,
now divide both sides and all terms by -2
what do you get ?

Answer 4

y=2x+1/-2

Answer 5

I did divide already 1/-2is a fraction

Answer 6

no , you are correct. But I would write it as
y = 2x - 1/2

Answer 7

oh ok

Answer 8

to find the slope of a line perpendicular to
y = 2x - 1/2

you take the slope (the 2 which is in front of the x)
multiply by -1 and then "flip it" to get -1/2

that is the slope you want in the answer.

Answer 9

the slope is m in
y= mx + b

in choice (a), the slope is -2. So that is not the answer
neither is (c)

Answer 10

to see if (b) is the answer, put
2x + 4y = -1
into
y= mx+b
form

Answer 11

4y=-2x-1
(/4)
y=-2x-1/4

Answer 12

and the slope is ?

Answer 13

-1/2
so my answer is b

Answer 14

yes

Answer 15

thank you for both the medal and the help and here the next one
Which equation has a graph that is parallel to the graph of 4x - 2y = 1?




Select one:


a. y = 2/3x - 2

b. y = -2x + 8

c. 2x -+ 4y = -1

d. 6x -3y = 9

Answer 16

parallel means the 2 lines have the same slope.

so put
4x - 2y = 1
into y= mx+b form

Answer 17

-2y=-4x+1

Answer 18

now divide both sides by -2

Answer 19

y=2x-1/2

Answer 20

and the slope is ?

Answer 21

1/2

Answer 22

no
the slope is m in
y= mx +b
match "m" to the number in front of the x

Answer 23

oh 2

Answer 24

now you have to find the slope of each line in the choices.
and find the one that has a slope of 2

Answer 25

I think its between b and d

Answer 26

in (b) you have
y = -2x + 8
the number in front of the x is -2. so the slope is -2. that is not the same as 2

Answer 27

so its between c & d

Answer 28

so put each into
y = mx + b form
and see which one has m=2 (the slope = 2)

Answer 29

the answer's d