Question

What is the slope of a line perpendicular to the line with equation y = 4x + 5?



A.
-1/4



B.
4


C.


–4


D.


–5

Answer 1

D.

Answer 2

ok are you sure

Answer 3

It is not D

Answer 4

ok

Answer 5

a perpendicular line will have a negative reciprocal slope.
y = 4x + 5...the slope in this equation is 4.
But we need the negative reciprocal of that slope. All that means is " flip " the slope and change the sign.

For example : you are given slope 1/6. You want a perpendicular line slope, so you " flip " the slope and change the sign. So the slope you would need would be -6/1 (see how I flipped the slope and changed the sign)

So what is the negative reciprocal of 4 ? Flip the slope and change the sign

Answer 6

-4

Answer 7

4 is the same as 4/1. So " flip " the slope and change the sign.
Not -4. Flip 4/1 and what do you get ? Then change the sign.

Answer 8

1/4 so a

Answer 9

or -1/4 oops sorry

Answer 10

It is a, but do not forget to change the sign. It was positive...change it to negative.
answer is -1/4.
Understand ?

Answer 11

yes i do

Answer 12

cool...that is always good to hear :)

Answer 13

What is the slope of a line parallel to the line with equation 2x – 5y = 9? so same thing right let me try and maybe you can check i wanna make sure i pass

Answer 14

you try and I will check. Keep in mind that a parallel line will have the same slope

Answer 15

theres no choices you have to figure it yourself

Answer 16

ok

Answer 17

put your equation in y = mx + b form, and the number in the m position is the slope

Answer 18

2 is the slope in this equation

Answer 19

no no 9

Answer 20

2x - 5y = 9
-5y = -2x + 9
y = -2/-5x - 9/5
y = 2/5x - 9/5

slope is 2/5. Parallel line will have the same slope.

Answer 21

do you understand or are you totally lost ?

Answer 22

i do understand it better

Answer 23

just remember, that in y = mx + b form, the slope is in the m position. And a parallel line will have the same slope. A perpendicular line will have negative reciprocal slope (thats when you flip the slope and change the sign)

Answer 24

ok

Answer 25

alright i will