EDGE Math 8

Suppose A, B, and C are real numbers. Choose the correct answer to each question.

1.	Which describes the graph of the equation $A x + B y + C = 0$ if $A = 0$ and $B \neq 0 ?$

a vertical line with x-intercept

- \frac{C}{A}

a horizontal line with y-intercept

- \frac{C}{B}

a line with a nonzero slope

\frac{- A}{B}

and y-intercept

\frac{- C}{B}

none of the choices

Answer: a horizontal line with y-intercept $- \frac{C}{B}$

2.	What is the domain of the set of ordered pairs $(x, y)$ that satisfy the given condition of the equation in item number 1?

{- \frac{C}{A}}

{- \frac{C}{B}}

the set of all real numbers

none of the choices

Answer: the set of all real numbers

3.	What is the range of the set of ordered pairs $(x, y)$ that satisfy the given condition of the equation in item number 1?

{- \frac{C}{A}}

{- \frac{C}{B}}

the set of all real numbers

none of the choices

Answer: ${- \frac{C}{B}}$

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