Question

@nirmalnema
@matricked

Answer 1

a

Answer 2

what ever value u put in place of x you will always get a -ve value

Answer 3

as xincrease the value of y decreases
option d

Answer 4

@nirmalnema @lilia222
if x= -20
y= -1/2(-20) -7 = 10-7 >0 (+ve)

Answer 5

its not ture if you will put decreasing value of x you will find y is also decreasing for some interval

Answer 6

again
if x= -30 y= -1/2(-30) -7 = 15-7 =8>0 (+ve)

Answer 7

thus as x decreases y increases or vice versa

Answer 8

the given graph is a st line having -ve x as well as y intercepts

Answer 9

@jim_thompson5910 @Cosmichaotic
I believe it's "D" ; but I need someone to check..

Answer 10

Are you still needing help @lilia222 ?

Answer 11

yes, I'm confused if "D" is the right answer, I need confirmations..

Answer 12

I can help if you need, just let me know - I was watching the fireworks. Their really awesome!

Answer 13

Alright. So, what you should always do when you have an equation with x and y as unknown variables, is make an x, y plot of points.

Lets do this together, if you like.

Answer 14

yes please,
and yes they are!

Answer 15

If you are needing to see the graph and decide the relationship between the variables -> ie. decreasing, increasing, etc.

Answer 16

Ok, so lets start with setting our x = 1

Answer 17

Which is a good place to start, usually setting x=1 or 0

Answer 18

Ok so if we set x = 1, let's see what y gives us.

f(x) =-1/2x-7

Answer 19

f(x) is always = to y

Answer 20

I think it's "D"

Answer 21

So y = -1/2(1)-7, plug in 1 for x, we get
x | y
1 | -7.5

Answer 22

So we can plot the point 1, -7.5
If this is a bit too much just tell me! I know it's a little confusing the way I'm explaining it lol

Answer 23

wait, so I'm wrong?

Answer 24

I'm not sure, I just want you to have a solution so if you wanna figure out how to do it for later you can. I will let you know in 2 sec!

Then setting x=2, x=3 we get y = -1/2(2)-7 and y = -1/2(3)-7
y=8 and y=-16.5

Answer 25

so you have the points (1, -7.5)(2, -8)(3, -16.5)

Answer 26

We can see as x is increasing, y is decreasing right? What was your answer? D? Yep!!

Answer 27

I really like to try and work out the problems with people so they can see how to do others like them in the future =0)

Answer 28

Next time I'll ask what kind of help you want, my bad.

Answer 29

.... yeah, thank you . Yay! It's right! :)

Answer 30

What are you working on by the way? Homework for class? Just curious =0)

Answer 31

Yes, I have to do practice assignments for my math class and if you get 3 wrong you have to re-do it! >_<