1. Section 1.1
Ratios and Rates

2. Defining a Ratio – Notes Slide
A ratio compares two quantities
without their units.
Notation:
7 to 3 7:3 3
7

3. Video Slide
Watch a video and take notes.
http://www.youtube.com/watch?v=yHVi-
tLs9UM&list=PLLCJfOlKvYr0mEA-wv8a-
cpsO6twfB-Eu

4. Group Work – Remember to use
complete sentences
At FRCC the ratio of instructors to students is 2 to 7
 Write at least two interpretations of this ratio.
 What fraction of the population is made up of
instructors?
 What fraction is made up of students?
 If there are 117 people on the campus, how many
students are attending FRCC?

5. Notes Slide
Write a ratio in lowest terms:
No units
No fractions
No decimals

6. Video Slide #2
Watch the video and take notes
http://www.youtube.com/watch?v=_0WgB4lsxtE&lis
t=PLLCJfOlKvYr0mEA-wv8a-cpsO6twfB-Eu

7. Homework Slide
Write a ratio in lowest terms:
Hint: Make sure units are both in hours first
9 hours to 3 day

8. Notes Slide: Defining a Rate
When writing a rate, always
include the units because in a
rate the units are different.
Ex: 500 miles in 10 hours
10 dollars for 3 people

9. Homework Slide
Watch video and take notes
Simplify the rate
http://www.youtube.com/watch?v=2wQ1xmtFqxU
teachers
students
5
140

10. Homework Slide
Write each rate as a fraction in
lowest terms:
a) 500 miles in 10 hours
a) 1270 bushels from 30 acres

11. Homework Slide
40% of students at FRCC are parents,
 Explain how the percent can be
interpreted as a rate.
 Write at least two interpretations of this
rate.

12. Homework
 Textbook Homework: Page 6 #1-9
 My Math Lab: All problems for Section 1.1