What is a function?
PSSA Math Grade 8 Sampler: Part 1

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Mathematics
•
8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Back
A function is a relation between a set of inputs and a set of possible outputs where each input is related to exactly one output.
2.
FLASHCARD QUESTION
Front
What does it mean for a function to be increasing?
Back
A function is increasing if, as the input values increase, the output values also increase.
3.
FLASHCARD QUESTION
Front
What is a y-intercept?
Back
The y-intercept is the point where a line crosses the y-axis, represented as (0, y).
4.
FLASHCARD QUESTION
Front
What is the slope of a line?
Back
The slope of a line is a measure of its steepness, calculated as the change in y divided by the change in x (rise/run).
5.
FLASHCARD QUESTION
Front
How do you find the slope from a graph?
Back
To find the slope from a graph, select two points on the line, calculate the rise (change in y) and run (change in x), and divide rise by run.
6.
FLASHCARD QUESTION
Front
What is a rational number?
Back
A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.
7.
FLASHCARD QUESTION
Front
What is the difference between a rational and an irrational number?
Back
Rational numbers can be expressed as fractions, while irrational numbers cannot be expressed as simple fractions and have non-repeating, non-terminating decimal expansions.
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