Update Final_Exam_Study_Sheet.md

Grade 9/Math/MFM1P1/Final_Exam_Study_Sheet.md

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 # Unit 4: Relationship in Geometry
 
+## Angles
+
+|Angle|Description|Example|
+|:----|:----------|:------|
+|Acute Angle|Less than 90 degrees||
+|Right Angle|90 degrees||
+|Obtuse Angle|More than 90 degrees||
+|Straight Angle|180 degrees||
+|Reflex Angle|More than 180 degrees|
+
+
 ## Angle Theorems
 
 ### 1. Transversal Parallel Line Theorems (TPT)     
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 - A line can be drawn through the most concentrataed points, to show a trend.
 - <img src="https://www.varsitytutors.com/assets/vt-hotmath-legacy/hotmath_help/topics/line%20of%20best%20fit-eyeball/lineofbestfit-e-1.gif" width="300">   
 
+
+## Line Of Best Fit
+
 ### How To the Line of Best Fit
   1. Find two points **```ON```** the ```line of best fit```
   2. Determine the ```slope``` using the two points
   3. Use ```point-slope form``` to find the equation of the ```line of best fit```
+ 
+
+### Properties Of Line Of Best Fit
+- Shows the trend for the data in a scatter plot.
+- Shows the pattern and direction of the data points.
+- Should pass through as many points as possible.
+- Remaining points should be grouped equally above and below the line and spread out along the line.
+- Helps make predictions for values not actually recorded and plotted.
+
+## Time - Distance Graph
+- Time is the independent variable and distance is the dependent variable   
+- You can't go backwards on the x-axis, as you can't go back in time   
+- Plot the points accordingly   
+- Draw the lines accordingly   
+- <img src="https://dryuc24b85zbr.cloudfront.net/tes/resources/6061038/image?width=500&height=500&version=1519313844425" width="400">   
+
+**Direction is always referring to:**
+
+ 1. ```go towards home```    
+ 2. ```going away from home```   
+ 3. ```stop```    
+