Table of Values
Graph
Math Mix Up
Equations
100
Tell whether the table represents a direct proportion or not. If direct, what is k and the equation? If not direct, why not?
Not Direct
100
Name two features of a Direct Proportion graph.
1. Passes through the origin (0,0)
2. A straight line
100
How many bakers does it take to bake a pi?
3.14!
100
Direct or not? If direct, what is k? If not, why not?
5y = 3x + 2
not
direct equations do not have +2
200
Doe this table represent a direct proportion or not. If direct, what is k and the equation. If not, why not.
Not Direct
200
Describe how you can find the constant of proportionality from a direct proportion graph.
Choose a point on the graph and divide the y value by x.
200
Does the description have a direct proportion?
A wavy line that passes through the origin.
No!
200
Direct or not? If direct, what is k? If not, why not?
-x+y=0
direct
k= 1
300
Tell whether the table is a direct proportion or not. If it is, state the constant of proportionality.
Yes; 3/2
300
Write a direct proportion equation for this graph.
y=x or y = 1x
300
What is the constant of variation in the following equation?
y=(-2/3)x
(-2/3)
300
Is the following equation direct or not?
n = 2c
Direct
400
Is the following table a direct proportion or not? If so, what is k?
Not Direct.
400
What is the constant of proportionality for the graph?
k=5
400
The total cost of tickets to the dance is directly proportional to the number of tickets purchased. If I pay $15 for 5 tickets, identify the constant of variation and write an equation to represent the relationship.
constant of variation=$3/ticket
y=3x is the equation
400
Is the following Direct or not? If it is direct, what is the constant of proportionality?
y/x = 0.4
Direct proportion
k=0.4
500
Is the table below a direct proportion? If so, what is k and the equation? If not, why not?
Direct; k = 2; y=2x
500
What does the point (2, 10) mean in this context?
At 2 hours, the person has run 10 miles.
500
Why do plants hate math?
Because it gives them square roots!
500
y is directly proportional to x where y = 18, and x = 3. What is the direct proportion equation?
y = 6x