Graphing a rational function with discontinuity

What is the first step you should take when dealing with rational expressions?

• Multiply the expressions

• Factor the expressions

• Subtract the expressions

• Add the expressions

Which of the following expressions is factorable?

• X^2 + 5X + 5

• X + 5

• X^2 + 4X - 5

• X - 1

What does the expression X^2 + 4X - 5 simplify to after factoring?

• X - 5

• X - 1

• X + 5

• X + 5 * X - 1

What is the value that X cannot equal in the function X^2 + 4X - 5 / X + 5?

• 5

• 1

• -5

• 0

How is a discontinuity represented on a graph?

• With a closed circle

• With an open circle

• With a dashed line

• With a solid line