+0  
 
0
59
1
avatar

1.

I try to do this one but the points don't match up...

2.

3.

4.

Guest Feb 14, 2018
Sort: 

1+0 Answers

 #1
avatar+85673 
+2

Here are the graphs .....

 

First one  : https://www.desmos.com/calculator/mw7uveztel

 

Second one  :  The top right graph is correct......the function is  constant at y  =  3   from -infinity  to x = 1

 

When x > 1,   y  =  x    ......  so  the points (2,2), (3,3) , (4,4)  etc. are on the graph

 

Third one :  https://www.desmos.com/calculator/ze9my3umlo

 

 

Last one : This one is probably a little strange to you......it's known as  "the ceiling function" graph

 

In other words, the   "ceiling"  of a value x is the least integer that is greater than or equal to x

 

So...ceiling  of  1.5  = 2

ceiling of -3.4  =  -3

ceiling of 2  = 2

 

These graphs  always have a "hole"  on the left end of each segment.....so we can eliminate the graphs at the bottom

 

To see which of the top  graphs are correct......let's pick an x value in the given interval, say, 1.5,  and put it into the function .....so......1.5 + 1  = 2.5.....and the  "ceiling" of this  = 3

 

So    (1.5, 3)  should be on the graph

 

Also  if we picked 1   then  1  + 1   =  2       and the ceiling of 2  = 2

So  (1, 2)  should also be on the graph

 

Looks like the graph on the top right is correct   !!!

 

Here's the graph  : https://www.desmos.com/calculator/ffxtehmg8g

 

 

cool cool cool

CPhill  Feb 14, 2018

13 Online Users

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details