Question 1033071
here's a reference that might help.


<a href = "http://onlinestatbook.com/2/graphing_distributions/line_graphsM.html" target = "_blank">http://onlinestatbook.com/2/graphing_distributions/line_graphsM.html</a>


here's the link to your image.


<a href = "http://i.imgur.com/l27Jz4b.png" target = "_blank">http://i.imgur.com/l27Jz4b.png</a>


basically, you're connecting the midpoint at the top of each bar together.


based on that, your selection appears to be selection B as shown below.


<img src = "http://theo.x10hosting.com/2016/050501.jpg" alt="$$$" </>


the reason is that you are connecting the midpoint of each bar.


the midpoint of each range and the value at that midpoint is shown in the following table:


<pre>


date range        midpoint (x-value)        value (y-value)


10 to 14                  12                     2
15 to 19                  17                     5
20 to 24                  22                     13
25 to 29                  27                     17
30 to 34                  32                     6


</pre>


this agrees with the (x,y) coordinates shown on the graph.