Understanding Domain, Range, Intercepts, and Zeros

What is the domain of a function?

• The highest point on a graph

• The set of all possible inputs of a function

• The lowest point on a graph

• The set of all possible outputs of a function

How is the range of a function defined?

• The distance between the highest and lowest points on a graph

• The midpoint of a graph

• The set of all possible inputs of a function

• The set of all possible outputs of a function

In set notation, how would you express a domain that extends from -3 to 4?

• {x | -3 < x < 4}

• {x | -3 ≤ x ≤ 4}

• {x | -3 ≤ x < 4}

• {x | -3 < x ≤ 4}

What does it mean if a graph has arrows on both ends?

• The graph is a closed interval

• The graph is a finite interval

• The graph is a point

• The graph extends infinitely in both directions

What is an x-intercept also known as?

• A minimum

• A maximum

• A zero

• A y-intercept

How is a y-intercept represented in an ordered pair?

• (x, 0)

• (0, y)

• (y, 0)

• (0, x)

Where does a graph cross the x-axis?

• At the x-intercept

• At the origin

• At the y-intercept

• At the maximum point

What is the y-intercept of the function y = 3x - 9?

• (-9, 0)

• (0, 3)

• (3, 0)

• (0, -9)

How can you find the x-intercept using a table of values?

• Look for the highest y value

• Look for the lowest x value

• Look for where y is zero

• Look for where x is zero

What does the graph of y = 3x - 9 look like?

• A horizontal line

• A parabola

• A vertical line

• A diagonal line