Question

Using the graph below, select all statements that are true.
(will attach in a sec!!)
a. f(1.4) = 1

b. f(4.5) = 5

c. This graph is one-to-one.

d. This is the graph of the greatest integer function.

e. f(0) = 0
*** choose ALL that apply!
My answers so far: A, D
Please explain! I think there might be one more answer :)

Answer 1

Hi! thanks for coming to help! Are my answers correct so far?

Answer 2

I know it is not B... i think... but is this a one to one function? And does f(0)=0 apply?

Answer 3

because for B 4.5 goes to 4 am i correct?

Answer 4

this graph might be better to look at
http://www.mathwords.com/f/floor_function.htm
they seem fine so far

and i believe you're just missing an answer

Answer 5

I've looked at several graphs. The graph you posted is slightly different since it doesn't have the open and closed circles.

Answer 6

so does f(0)-0 not apply since there is no line on the 0??

Answer 7

oops! f(0)=0 does not have a line on it on my graph?

Answer 8

so would it be C the graph is one to one function also? since they do not overlap? @completeidiot and @Hero ??

Answer 9

f(0) appears to equal -1 anyway

Answer 10

This graph looks like it was designed to trick you

Answer 11

oh i see @Hero so the other answer is that it is a one to one function then??

Answer 12

it looks like a normal step function so f(0)=0

Answer 13

Looks can be deceiving

Answer 14

but there is not line on the 0 and on my graph I looked again after @hero pointed it out, that f(0) actually goes to -1....

Answer 15

The graph looks nothing like what you posted from mathwords.com @completeidiot

Answer 16

well no idea then

Answer 17

oh wait i zoomed in and it does have a line on the 0, does that mean f(0)=0 then?? lemme post it hold on a sec!

Answer 18

do you see it? if u look closely, there is a blue line on 0...

Answer 19

does that help??

Answer 20

The first graph you posted is tricky

Answer 21

@hero it looks like a graph you would get if you put it into a graphing calculator

Answer 22

i zoomed in and it showed part of it better :)

Answer 23

Okay, well, if that's the case, maybe it can be the greatest integer function. But yeah f(0) = 0

Answer 24

if d is true then e would also be true

Answer 25

@iheartfood, you should have posted the zoomed in graph first :P

Answer 26

oops! sorry! and a greatest integer function cannot be one to one b/c it doesn't pass the horizontal line test right??

Answer 27

So the final answers are A,D,E ????

Answer 28

@Hero and @completeidiot ??? am i right??

Answer 29

i believe so

Answer 30

OMG!! thanks so much!! :) Im a give u best answer @completeidiot and can u pls give @Hero one b/c i can only give one :(

Answer 31

unfamiliar with one to one function
i do no think it is one- quick reading and because it does not pass the horizontal line test

Answer 32

cool! thanks! i'll post my next question in a bit and i'll send u the link! thanks!!