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What are the x-intercept and y-intercept of 3x − 4y = 12?

Answer and explanation

Correct answer: (4, 0) and (0, −3)

The governing rule is that an x-intercept is found by setting y = 0, while a y-intercept is found by setting x = 0. For the x-intercept, 3x − 4(0) = 12, so 3x = 12 and x = 4; the point is therefore (4, 0). For the y-intercept, 3(0) − 4y = 12, so −4y = 12 and y = −3; the point is (0, −3). Thus option A is correct. Option B reverses both signs. Option C incorrectly treats the coefficients as the intercept coordinates. Option D contains incorrect signs and also presents the two intercepts in the reverse order requested. Substitution verifies both coordinates: 3(4) − 4(0) = 12 and 3(0) − 4(−3) = 12.

Related tags

X-InterceptY-InterceptLinear EquationGraphical MethodGraphical Method Of Finding Solutions.Graphical Method Of Finding SolutionsPair Of Linear Equations In Two VariablesMathematics

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