Transcript of "FRCC MAT050 Ratios and Rates (Section 1.1)"
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
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