Removable Discontinuities in Rational Functions Quiz

What is the x-value of the hole in the equation x^2 - 1 over x + 1?

• x = 1

• x = -1

• x = 0

• x = 2

After finding the x-value of a hole, how do you determine the y-value?

• By setting the equation to zero

• By substituting the x-value into the original equation

• By factoring the denominator

• By multiplying the x-value by 2

In the second example, what is the x-value of the hole for the equation (x - 4)(x - 2) over x - 4?

• x = 4

• x = 0

• x = 2

• x = -4

What is the y-value of the hole when x = 4 in the second example?

• y = 0

• y = 2

• y = -2

• y = 4

In the final example, what is the x-value of the hole for the equation (2x + 1)(x + 7) over x + 7?

• x = 7

• x = -7

• x = -1

• x = 1