Exploring Rational Expressions: Function or Not

The video tutorial explains how to identify functions using input-output mapping, the vertical line test, and analyzing sets of coordinates. It provides detailed instructions on how to determine if a relation is a function by checking for repeating X values and using the vertical line test on graphs. The tutorial concludes with instructions for an assignment involving function identification and grading criteria.

What is the relationship between input and output in a function?

• Input is Y and output is X

• Input is X and output is Y

• Input and output are both Y

• Input and output are both X

What indicates that a set of points is not a function?

• All lines coming from Y values

• No lines coming from any X value

• Only one line coming from each X value

• Multiple lines coming from a single X value

What is the purpose of the vertical line test?

• To determine if a graph is a function

• To find the slope of a line

• To identify the Y-intercept

• To calculate the area under a curve

What does it mean if a vertical line touches a graph at more than one point?

• The graph is a parabola

• The graph represents a function

• The graph does not represent a function

• The graph is a straight line

Which set of coordinates best describes a function?

• (-3, 3), (5, 8)

• (5, -1), (1, -1)

• (-6, -4), (-2, -6)

• (2, -2), (2, -2)

What is a key characteristic of a function in a set of coordinates?

• Repeating X values

• Unique Y values

• Unique X values

• Repeating Y values

Which set of coordinates does not describe a function?

• (-6, -3), (-2, -6)

• (6, 3), (1, 1)

• (2, -2), (0, -3)

• (8, 2), (3, 3)

What should you do with the cards in the next assignment?

• Write your name on them

• Color them

• Glue them in the correct category

• Throw them away

How many grades will you receive today?

• One

• Two

• Three

• Four

What will happen if you do not finish and are not actively working?

• You will get a reward

• You will get a new assignment

• You will get a phone call home

• You will get extra time