Question

Determine whether linear, quadratic or exponential...

Answer 1

This is what I got for 0 to 5:

http://www.wolframalpha.com/input/?i=%280%2C2.7%29%281%2C4.1%29%282%2C1.5%29%283%2C-5.1%29%284%2C-15.7%29%285%2C-30.3%29+

Answer 2

This is what I got for 5 to 9:

http://www.wolframalpha.com/input/?i=%285%2C-30.3%29%286%2C-15.1%29%287%2C-7.6%29%288%2C-3.8%29%289%2C-1.9%29

Answer 3

To me it looks like they are both quadratic and I put that but 1 of them was wrong and they won't let me know which one is quadratic and what the other one is?

Answer 4

hi, you still working here?

Answer 5

@DanJS Hey I am back I had to do something sorry.

Answer 6

I know one is quadratic for sure I just do not know which one?

Answer 7

hi

Answer 8

this my last, then i hav eto run for a bit

Answer 9

ok thank you

Answer 10

Linear must have a constant slope, for each increase of x, y increases same amount,

Answer 11

th efirst interval x=0 to x=5 increases, then decreases, that is not linear

the second interval is always decreasing, but not by the same amount each time, not linear

Answer 12

to be exponential, it has a constant multiplier for each increase in x,

y = a*(b)^x

for each increase in x, the y value is multiplied by another b

Answer 13

a is the value when x=0,

Answer 14

the first interval changes from increasing to decreasing, that must be quadratic from those choices

Answer 15

oh I see it now 0 to 5 is quadratic

Answer 16

5-9 is always increasing but slowing down at a exponential rate

Answer 17

oh ok so 5-9 exponential

Answer 18

to check , you can divide one y value by the previous, and it should be the same ratio between one and the previous

Answer 19

that is the b value in

y=a*b^x

Answer 20

notice, each is 0.5 (they rounded a tiny bit for some values) times the previous, it is an exponential

Answer 21

anything not clear?

Answer 22

No I am going to review everything you wrote, thank you for your help :)

Answer 23

1 sec ill find something

Answer 24

sorry i have to run for a bit, look at the algebra parts here, examples maybe, i was gonna look https://drive.google.com/folderview?id=0B1YZD9uzvB5TfnkzNzg5LU54VC1zUENBNHZoWlUxYXk1OXQtNklXdVVtZnA1T3c4X3hMMWM&usp=drive_web#list

Answer 25

I was just looking at this other one I have

http://www.wolframalpha.com/input/?i=%280%2C3.2%29%281%2C4.6%29%282%2C6%29%283%2C7.4%29%284%2C8.8%29%285%2C10.2%29+%285%2C10.2%29%286%2C8.5%29%287%2C6.8%29%288%2C5.1%29%289%2C3.4%29

and what you said about linear "Linear must have a constant slope, for each increase of x, y increases same amount" I would say 0 to 5 and 5 to 9 are both linear.

Answer 26

Ok will do thanks :)

Answer 27

yeah linear y varies directly with x at a constant rate, the slope

Answer 28

y = m*x + b

Answer 29

be back later..

Answer 30

Ok