Final answer:
To find the rate of change or slope of a line, use two points on the line and calculate the change in the dependent variable divided by the change in the independent variable.
Step-by-step explanation:
The rate of change, or slope, of a line can be found using two points on the line. You can choose any two points on the line, but it is best to choose widely separated points to minimize errors. To find the slope, you need to calculate the change in the dependent variable (y) divided by the change in the independent variable (x). This can be represented as:
slope = (y2 - y1) / (x2 - x1)
For example, if you have two points on a line: (2, 5) and (6, 10), the slope can be calculated as:
slope = (10 - 5) / (6 - 2) = 5 / 4 = 1.25