Module 3 lesson 14.notebook
January 17, 2017
Tuesday January 17, 2017
Aim: Ordered pairs
Module 3 lesson 14
A grocery store sign indicates that bananas are 6 for $1.50, and a sign by the oranges indicates that they are 5 for $3.00. Find the total cost of buying 2 bananas and 2 oranges.
A $0.85 B $1.70 C $2.25 D $4.50
What are ordered pairs? Describe in your own words.
Two numbers written in a certain order. Which axis do we plot first?
Which axis do we plot second?
Example 1
The first number of an ordered pair is called the ____________
The second number of an ordered pair is called the ________________
Example 2: Ordered pairs are like a set of directions; they indicate where to go in one direction, and then indicate where to go in the second direction.
Scenario 1: The seats in a college football stadium are arranged into 210 sections, with 144 seats in each section. Your ticket to the game indicates the location of your seat using the ordered pair of numbers (123, 37). Describe the meaning of each number in the ordered pair and how you would use them to find your seat.
Scenario 2: Airline pilots use measurements of longitude and latitude to determine their location and to find airports around the world. Longitude is measured as 0–180ᵒ east or 0–
180ᵒ west of a line stretching from the North Pole to the South Pole through Greenwich, England, called the prime meridian. Latitude is measured as 0–90ᵒ north or 0–90ᵒ south of the earth’s equator. A pilot has the ordered pair (90ᵒ west, 30ᵒ north). What does each number in the ordered pair describe? How would the pilot locate the airport on a map? Would there be any confusion if a pilot were given the ordered pair (90°, 30°)? Explain.
Exercise 1: a ­ h
Exercise 2: a ­ i
Problem set:
1