How do you find slope when no right
triangles are given?
What’s the slope
of the line?
In this lesson you will learn
to find the slope of a line on
a coordinate plane by
drawing a right triangle.
Let’sReview
Review
Let’s
For any line, the ratio of rise to run is
constant.
We call this ratio the slope of the line.
A Common
Let’s
Review Mistake
Be careful!
rise
Slope =
run
run
Slope =
rise
Core
Lesson
Let’s
Review
What’s the slope
of the line?
rise
Slope =
run
4
2
2
Slope =
4
1
Slope =
2
or
Slope = 0.5
Core
Lesson
Let’s
Review
What’s the slope
of the line?
rise
Slope =
run
4
Slope =
2
Slope = 2
2
4
(10, 7)
(8, 3)
In this lesson you have
learned to find the slope of a
line on the coordinate plane
by drawing a right triangle.
Guided
Practice
Let’s
Review
What’s the slope
of the line?
Guided
Practice
Let’s
Review
What’s the slope
of the line?
(22, 14)
(13, 11)
Extension
Let’s
Review Activities
Develop a formula: Find the slope of the
line through (a, b) and (c, d).
(c, d)
(a, b)
Extension
Let’s
Review Activities
Do the points (5, 7), (8, 9), and (11, 10) lie
on a straight line? How do you know?
Quick Quiz
Let’s
Review
What’s the slope
of the line?
Quick Quiz
Let’s
Review
What’s the slope
of the line?
(5, 10)
(3, 4)