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Which point is correct for the equation (y=2x)?

Answer and explanation

Correct answer: ( (2,4) )

The direct answer is option A, the point \((2,4)\). A point \((x,y)\) lies on the line \(y=2x\) exactly when its coordinates satisfy that equation. For option A, substitute \(x=2\): the right side is \(2(2)=4\), which equals \(y=4\). Therefore \((2,4)\) is on the line. Option B, \((3,5)\), fails because \(2(3)=6\), not 5. Option C, \((1,3)\), fails because \(2(1)=2\), not 3. Option D, \((4,2)\), fails because \(2(4)=8\), not 2. The safest method is substitution: take the x-coordinate, multiply it by 2, and compare with the y-coordinate. The line has slope 2, so y must always be twice x. Memory cue: for \(y=2x\), every valid point has the pattern \((x,2x)\).

Related tags

Linear EquationsPoint On GraphSubstitutionEasy

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