4.1 Coordinate Grid
4.2 Unit Rates
4.3 Constant Rates of Change
4.4 Proportional Relationships & Graphs
100
(x, y)
Which direction does the x-coordinate tell you to go?
Which direction does the y-coordinate tell you to go?
x: left/right
y: up/down
100
A student types 650 words in 25 minutes. Which expression shows how to find the unit rate in words per minute?
A 650/25
B 25/650
A
100
Does the table show a proportional relationship? If so, what is the constant of proportionality?
Yes, 0.8
100
Draw a line through the points. Why does this line show a proportional relationship?
1) straight line
2) goes through (0,0)
200
Write the ordered pair for point D.
(4, 1)
200
Calvin bought 1.5 pounds of cheese for $11.25. Find the cost per pound.
$7.50/lb
200
Which table shows a constant rate of change? Explain.
D; each one is $37.50/day
200
Find the constant of proportionality.
40 miles per hour
300
What point is located at (-3, -2)?
F
300
As storm clouds gathered, the temperature fell 44 degrees in 3/4 of an hour. At what rate was the temperature falling in degrees per hour?
58 2/3 degrees per hour
300
There is a proportional relationship in minutes spent shelling peas and pounds of peas shelled. What is the constant of proportionality?
0.2 pounds/min
300
What is the constant of proportionality?
$15/week
400
Which point is located at (2, -4)?
H
400
Which is the better buy?
5-pack of t-shirts for $3.95
9-pack of t-shirts for $7.20
5-pack
400
The table below shows that the number of miles driven by Landon is directly proportional to the number of gallons he used.
Write an equation for the relationship.
y=20.40x
400
What equation shows the line through the data points on the graph?
y=15x
500
Name the ordered pair for point B.
(0, -4)
500
Which is the fastest in feet per minute? Explain.
A 18 feet in 20 minutes
B 90 feet in 120 minutes
C 60 feet in 90 minutes
D 11 feet in 15 minutes
A; it is traveling more feet per minute compared to the other options.
500
The table shows the amount of money Anna earns for working different numbers of hours. Write an equation to find the amount of money earned for any number of hours worked.
y=25.60x
500
A car traveled through town at a constant speed of 25 miles per hour. Plot at least 3 points and draw a line to show how the distance traveled in miles is related to the time in hours. Write an equation to represent the situation.
y=25x
