Introduction to Functions

Question 1

On a coordinate plane, solid circles appear at the following points: (negative 4, 2), (negative 2, 2), (negative 1, 4), (1, 1), (1, 3), (2, negative 3).

Revolt · Accepted Answer

(1, 3)

Question 2

On a coordinate plane, solid circles appear at the following points: (negative 3, 2), (negative 3, 3), (1, 4), (1, negative 4), (2, negative 4), (2, negative 2).

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3 points

Question 3

Which graph shows a set of ordered pairs that represents a function?

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On a coordinate plane, solid circles appear at the following points: (negative 5, 2), (negative 4, negative 4), (negative 3, 4), (negative 2, 2), (2, negative 2), (4, 3).

Question 4

On a coordinate plane, a line with a 90-degree angle crosses the x-axis at (negative 4, 0), turns at (negative 1, 3), crosses the y-axis at (0, 2) and the x-axis at (2, 0).

Revolt · Accepted Answer

all real numbers less than or equal to 3

Question 5

Which statements apply to the ratio of rice and water? Choose two options.

Revolt · Accepted Answer

The amount of water is the dependent value.; The amount of rice is the independent value.

Question 6

On a coordinate plane, a curved line begins at point (negative 2, negative 3), crosses the y-axis at (0, negative .25), and the x-axis at (1, 0).

Revolt · Accepted Answer

all real numbers greater than or equal to –3

Question 7

What is the domain of the given function?{(3, –2), (6, 1), (–1, 4), (5, 9), (–4, 0)}

Revolt · Accepted Answer

{x | x = –4, –1, 3, 5, 6}

Question 8

To bill customers for water usage, one city converts the number of gallons used into units. This relationship is represented by the equation u = 748g, where g is the total number of gallons of water used and u is the number of units. Determine which statements about the relationship are true. Choose two options.g is the dependent variable.u is the dependent variable.g is the independent variable.u is the independent variable.The two variables cannot be labeled as independent or dependent without a table of values.

Revolt · Accepted Answer

u is the dependent variable.; g is the independent variable.

Question 9

A mapping diagram showing a relation, using arrows, between input and output for the following ordered pairs: (negative 3, negative 9), (2, negative 6), (negative 5, 4), (1, 2), (6, 0).

Revolt · Accepted Answer

{x | x = –5, –3, 1, 2, 6}

Question 10

Livia eats a chicken drumstick with 11 grams of protein. She also eats x cheese sticks, each with 7 grams of protein. The table shows y , the total number of grams of protein that Livia will consume if she eats x cheese sticks. Livia may eat only part of a cheese stick, so x may not always be a whole number.

Revolt · Accepted Answer

all real numbers greater than or equal to 11

Introduction to Functions Answers

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