LDM Final Exam Review Part 3

What quadrant is point D located in?

• 1

• 2

• 3

• 4

What quadrant is point B located in?

• 4

• 3

• 2

• 1

Is the following set of points a function {(2, -4), (-3, -4), (1, 6), (-2, 9)}?

• yes

• no

Answer explanation

Yes, this is a function because all of the points have DIFFERENT "X" values.

Is the following set of points a function {(8,4), (8,2), (-8,4), (-8,2)}?

• yes

• no

Answer explanation

There are points with the same X value, so this can NOT be a function.

Is the following set of points a function {(5,-1), (5,3), (5,1), (5,-4)}?

• yes

• no

Answer explanation

There are points with the same X value, so this can NOT be a function.

Is the following set of points a function {(2,2), (3,2), (4,2), (5,2)}?

• yes

• no

Answer explanation

Yes, this is a function because all of the X values are DIFFERENT. It does not matter what the Y values are in order to be a function.

Is this a graph of a function?

• yes

• no

Answer explanation

In order to pass the "vertical line test" and a line to be considered a function, the vertical line can NOT touch the circle (line) in more than 1 spot on that vertical line (tip: remember to check it on multiple vertical lines).

Is this line a function?

• yes

• no

Is this line a function?

• yes

• no

What are the outputs { y or f(x) } for the linear equation seen here?

• y = 1

  y = 2

  y = 3

  y = 4

• y = 15

  y = 9

  y = 3

  y = -3

• x = 4.5

  x = 3

  x = 1.5

  x = 0