Question

Compare and contrast these four functions using complete sentences. Focus on the slope and y-intercept first, and then on any additional properties of each function.

Answer 1

I am having trouble with figuring out slopes and y-intercept's in some of these equations and to compare and contrast, can someone please help?

Answer 2

@ash2326

Answer 3

@Hero sorry to bother you again :(

Answer 4

@AravindG ?

Answer 5

Here, take a look at this..see if it helps:

http://openstudy.com/study#/updates/5228fab0e4b0a8663d54ee60

Answer 6

It does, i'm sorry for asking this but how do I read the first one's y-intercept and slope?

Answer 7

i already have the other three just the table one i don't know how to read?

Answer 8

@Hero i am sorry to bother you but can you at least explain to me how to figure out the slop and y-intercept for the table one please?

Answer 9

If you are confused, just re-write the first one in algebraic form:
y = 5 + 2x

Answer 10

Okay, for the table one...You have to find the slope. Take two points and use the slope formula to find m. Then find b. Then write y = mx + b

Answer 11

I tried putting these numbers on a graph and from the first x and f(x) to second one it was a slope of 8/2 and from the second one to the third is 4/2 ? i'm not sure which are the two points?

Answer 12

Trust me, if you try to use the graph way to do it, it won't be as accurate. You need to change it to the algebraic form y = mx + b

Answer 13

but how do i do that? where are the points? we have x = -1 and f(x) = -7, x= 1 and f(x) = 1, and x = 3 and f(x) = 5

Answer 14

y = f(x)

Answer 15

Each row represents an (x,y) point

Answer 16

ahh ok so now i try to find to slop and put them into point slop form so i can get slope intercept form right? and don't i have (-1,-7), (1,1), and (3,5) ?

Answer 17

Yes, you do, I was looking at the other question another student posted. Yes, put it in slope-intercept form so that you can understand it better.

Answer 18

But the slope for (-1,-7) and (1,1) is 8/2 and the slope for (1,1) and (3,5) is 4/2 how do i know which slope to use?

Answer 19

Wait...

Answer 20

I'm pretty sure that's a mistake and it is supposed to be linear.

Answer 21

How so?

Answer 22

how do i know what to use?

Answer 23

Just point out the mistake to your teacher. It's supposed to be linear. All of the functions are linear.

Answer 24

Unless you're doing calculus, at your level, you can only find the slope of a linear function. In the instructions, you are asked to find the slope and y-intercept. That's how we know the table is a mistake.

Answer 25

ok so i would tell him that it is all suppose to be linear and only the first table has a mistake right?

Answer 26

Yes

Answer 27

You could take some initiative and change the coordinates in a way that forces the first table to be linear. Then you'll be able to finish the question.

Answer 28

ya but i will just compare and contrast the ones that are ok and then tell him about the mistake, but thank you for your help :)

Answer 29

yw