Relations & Functions
Function Rules, Tables, & Graphs
Writing a Functions Rule
Direct Variation
Describing Number Patterns
100
A set of ordered pairs.
What is a relation?
100
Given the points {(0,1), (1,2), (2,3), (1,4)} determine whether the relations is a function or not a function?
What is not a function?
100
The three types of functions we graphed.
What is linear, quadratic, and absolute value?
100
The point that the graph of a direct variation function must pass.
What is the origin (or (0,0))?
100
The sequence 8.4, 6.4, 4.4, 2.4, ... is a ______________ sequence because there is a common difference of -2 between each term.
What is arithmetic?
200
The set of first coordinates in ordered pairs or the set of input values.
What is the domain?
200
A function rule for the following set of points {(2,3), (4,5), (6,7), (8,9)}.
What is f(x) = x + 1?
200
To graph a linear equation like y = 5x +6 you need to find at least ________ ordered pairs to graph.
What is two?
200
In the direct variation equation y = -3/4 x. The constant of variation k is...
What is -3/4?
200
Each number in a sequence is called a _______________.
What is a term?
300
A relation that assigns exactly one value in the range to each value in the domain.
What is a function?
300
A function rule that represent the amount of money you earn mowing lawns at $15 per lawn.
What is F(n) = 15n?
300
In a direct variation when x increases, y ______________.
What is increases?
300
The 5th term in the sequence 1, 4, 9, 16, .... is __________.
What is 25?
400
You use this test to determine if a graph represents a function.
What is the vertical-line test?
400
Y represents the ________________ variable.
What is dependent variable?
400
Write a function rule to represent the following: change from $10 bill is you buy bananas at $.69 per pound.
What is f(x) = 10 - .69(x)?
400
Write an equation of direct variation that includes the point (3,-7).
What is y = -7/3 x?
400
In the arithmetic sequence A(n) = -3 + 4(n-1). The -3 is the _______________ in the sequence.
What is first term?
500
The range of the function y = 4x-7 when the domain is {-4,0,1,5}.
What is {-23, -7, -3, 13}?
500
A graph of this function y = |x| - 7 would look like what letter?
What is V?
500
Given f(x) = x/2 + 7. Find f(20).
What is 17?
500
To change the equation 2x -7y = 5 into a direct variation, you would need to change the ____________ to zero.
What is 5?
500
In the arithmetic sequence A(n) = -3 + 4(n-1). Find the 5th term of the sequence.
What is 13?
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