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What is the (y)-intercept of the line (3x+2y=12)?

Answer and explanation

Correct answer: (6)

The direct answer is option A, 6. A y-intercept is the point where a graph meets the y-axis. Every point on the y-axis has x=0, so substitute x=0 in 3x+2y=12: 3(0)+2y=12, hence 2y=12, and therefore y=6. Thus the intercept point is (0,6), while the question asks for its y-value, 6. Option A is correct because it gives 6. Option B, 4, would result from an incorrect calculation such as 12 divided by 3. Option C, 12, is the constant on the right side, not the y-intercept after solving the equation. Option D, 3, is the coefficient of x and is not obtained by putting x=0. A useful exam cue is: for a y-intercept, set x=0; for an x-intercept, set y=0. This reasoning is complete and the supplied answer is consistent.

Related tags

Standard-FunctionsLinear-GraphY-Intercept

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