Conclusion
(8 points)

Clearly state whether hypothesis fails to reject or is rejected.  Do not use any other words for this part of the conclusion. You may NOT state it is correct, proven correct, or true. You have not run the experiment enough to make use of that level of certainty to use those words. Explain (or justify) your reasoning and compare your actual results to your original hypothesis. You may also wish to make similar statements with regard to your null hypothesis.

Explanation based on trends shown in graphs
Explain (or justify) your reasoning you reject or fail to reject your hypothesis using the trends shown in the graph. Here's where a best-fit line can be helpful. Also, it is a good idea to state the correlation between the independent variable and the dependent variable. Example: "The hypothesis was rejected as there appears to be a positive slope (or positive correlation) shown in the graph of...."

Interpretation and explanation contains observations, trends or patterns revealed by the data.
"Analysis may include comparisons of different graphs or descriptions of trends shown in graphs. The explanation should contain observations, trends or patterns revealed by the data." From IB Internal Assessment Online Workshop, 2009. This section is a deeper level of justifying your reason for rejecting or failing to reject the hypothesis. Sometimes looking over the raw data can give you clues as to why the analysis indicates a particular outcome.

Comparison to literature (as required) including references

"When measuring an already known and accepted value of a physical quantity, students should draw a conclusion as to their confidence in their result by comparing the experimental value with the textbook or literature value. The literature consulted should be fully referenced." From IB Internal Assessment Online Workshop, 2009