SAT Linear equations in two variables Practice Question 4 (Easy)

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Question bank / Linear equations in two variables

Math · AlgebraEasy

What is the $x$ -intercept of the graph of $3x + y = 9$ in the $xy$ -plane?

$(0, 9)$

$(3, 0)$

$(9, 0)$

$(0, 3)$

Show answer and explanation

Answer: B

At the $x$ -intercept, $y = 0$ . Then $3x = 9$ , so $x = 3$ , giving the point $(3, 0)$ .

Choice A is the $y$ -intercept, found by setting $x = 0$ .

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