Direct Variation
Inverse Variation
Functions
Relations
Vocabulary
100
A direct variation equation is in the form _____
What is y=kx
100
In an inverse variation, when y increases x__________
What is decreases
100
Is this a function? {(3,2) (4,2) (-1,2)} Why or why not?
What is yes, x coordinates don't repeat
100
Every relation is a function. True or False?
What is false
100
domain
What is all the x-coordinates
200
In a direct variation, when x increases y ___________
What is increases
200
Find the constant of variation if x=6 and y=3
What is 18
200
Is this a function? {(6,0)(-3,0)(6,-1)} Why or why not?
What is no, the 6 repeats
200
Three ways to represent a relation are...
What is table, ordered pairs, graph
200
In the formula, y=kx, k is known as
What is constant of variation
300
Suppose y varies directly as x and y=10 when x=15. Find x when y=6.
What is 9
300
The formula for inverse variation is
What is xy=k
300
Is this a function? Why or why not? 3--2 4--2 5--3 5--2
What is no, 5 value repeats
300
The set of all x-coordinates in a relation is called...
What is domain
300
A __________ is an equation that makes a straight line.
What is linear equation
400
If y varies directly as x and y=18 when x=27, find y when x=12
What is 8
400
y varies directly as x and y=4 when x=2, find y when x=16
What is 1/2
400
What test do we use on a graph to determine if it is a function?
What is vertical line test
400
The range in a relation is....
What is set of all y-coordinates
400
The second coordinate in an ordered pair is called _________
What is y-coordinate
500
The direct variation formula is____.
What is y=kx
500
y varies inversely as x and y=18 when x=6, find y when x=3
What is 36
500
Find the range of y=2x+1, if the domain is {-1,0,1}
What is -1,1,3
500
Find the domain of y=-3x if the range is {0,-3, -6}
What is 0, 1,2
500
The set of all y-coordinates in a relation is called the ______
What is range
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