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A student chose (4, 0) and (0, 3) to graph 3x + 4y = 12. How is this choice?

Answer and explanation

Correct answer: Correct

The governing graphical principle is that two distinct points satisfying a linear equation determine its straight-line graph. Test (4, 0): 3(4) + 4(0) = 12 + 0 = 12, so it lies on the line. Test (0, 3): 3(0) + 4(3) = 0 + 12 = 12, so it also lies on the line. These are the x-intercept and y-intercept respectively, and they are distinct points, so joining them gives the required graph. Therefore option A is correct. Option B is false because (4, 0) satisfies the equation, and option C is false for the same reason regarding (0, 3). Option D is false because the coordinates are different, not identical.

Related tags

Pair Of Linear EquationsGraphical MethodInterceptsCoordinate VerificationGraphical Method Of Finding Solutions.Graphical Method Of Finding SolutionsPair Of Linear Equations In Two VariablesMathematics

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