What is a function?
STAAR Review Week 1 Test Grade Repair

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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
Which set of values is a function? (9,5) (10,5) (9,-5) (10,-5), (3,4) (4,-3) (7,4) (3, 8), (6,-5) (7, -3) (8, -1) (9, 1), (2, -2) (5, 9) (5, -7) (1, 4)
Back
(6,-5) (7, -3) (8, -1) (9, 1) is a function because no x-value is repeated.
3.
FLASHCARD QUESTION
Front
What is the formula for slope?
Back
The slope (m) is calculated as m = (y2 - y1) / (x2 - x1).
4.
FLASHCARD QUESTION
Front
State the slope of the line represented by the equation y = (4/5)x + 2.
Back
5.
FLASHCARD QUESTION
Front
Which set of side lengths form a right triangle? 3, 4, 7; 33, 56, 65; 66, 72, 97; 10, 15, 25
Back
33, 56, 65 form a right triangle because they satisfy the Pythagorean theorem: a^2 + b^2 = c^2.
6.
FLASHCARD QUESTION
Front
What is the Pythagorean theorem?
Back
7.
FLASHCARD QUESTION
Front
Categorize the slope of the line y = -3x + 2.
Back
Negative.
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