Mini Lesson Question
Question #1: Find Slope
Find the Slope of a Line Using Points on a Graph
The slope of a line is the ratio of the change in and the change in . You can use the slope formula, , to find the slope of the line through points and .
Find the slope of the line that goes through points
- and
- and
- and
Here’s how to find the slope given two points.
a.
Step 1 - First, name as point 1 and as point 2.
and
and
Step 2 - Use the slope formula.
Step 3 - Substitute the values: , , , .
Step 4 - Simplify.
b.
Step 1 - First, name as point 1 and as point 2.
and
and
Step 2 - Use the slope formula.
Step 3 - Substitute the values: , , , .
Step 4 - Simplify.
c.
Step 1 - First, name as point 1 and as point 2.
and
and
Step 2 - Use the slope formula.
Step 3 - Substitute the values: , , , .
Step 4 - Simplify.
Try it
Try It: Find the Slope of a Line Using Points on a Graph
Find the slope of the line that goes through points and .
Here is how to find the slope given two points:
Step 1 First, name as point 1 and as point 2.
and
and
Step 2 Use the slope formula.
Step 3 Substitute the values: , , , .
Step 4 Simplify.
Check Your Understanding
What is the slope of the line that goes through points and ?
Multiple Choice:
Check yourself: Substitute the coordinates of points and into the slope formula: .
Videos: Finding the Slope of a Line
Khan Academy: Slope from a Graph
Watch this video to see how to find the slope from a graph.
Khan Academy: Slope from Two Points
Watch this video to see how to find the slope given two points.