1. Graphing

2. Graphing (the basics) X-axis: Horizontal; Independent variable
Y-axis: Vertical; Dependent variable
Title: Dependent variable vs. Independent Variable
Slope = Rise/Run or ∆y/ ∆x
Formula of a line:
y= mx+b
m = slope
b = y-intercept

3. Dependent vs. Independent Variable
Best fit line
If line looks straight, then do not connect the dots, draw a line that is the average of all of the dots
Dependent
Dependent vs. Independent Variable
(Unit)
Independent Variable (unit)

4. How to calculate Slope Find two points on your line
Take the difference between the y-values
Take the difference between the x-values
Divide the y difference by the x difference
For example…
(5, 4) and (10, 7)
7-4 = 3
10-5 = 5
3/5 or 0.6

5. Types of Graphs
Direct (as one increases; the other increases proportionally)
Indirect (as one increases; the other decreases proportionally)
Inverse (as one increases, the other decreases substantially)
No Relationship