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Algebra / Linear equations in two variables Difficulty: Easy

The y-intercept of the graph of 12 x + 2 y = 18 in the xy-plane is 0,y. What is the value of y ?

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Explanation

The correct answer is 9 . It's given that the y-intercept of the graph of 12 x + 2 y = 18 in the xy-plane is 0,y. Substituting 0 for x in the equation 12 x + 2 y = 18 yields 120+2y=18, or 2 y = 18 . Dividing both sides of this equation by 2 yields y = 9 . Therefore, the value of y is 9 .