Final answer:
The expression that can be used to find the slope is m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are any two points on the line.
Step-by-step explanation:
The expression that can be used to find the slope is m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are any two points on the line.
- Choose two points on the line.
- Substitute the coordinates of the two points into the formula.
- Calculate the difference in the y-coordinates and the difference in the x-coordinates.
- Divide the difference in the y-coordinates by the difference in the x-coordinates to find the slope.
For example, if we have two points (3, 5) and (7, 9), the slope would be (9 - 5) / (7 - 3) = 4 / 4 = 1.