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If point (C) is ( \sqrt{19} ) units to the left of (2), what is the coordinate of (C)?

Answer and explanation

Correct answer: (2-\sqrt{19})

The direct answer is option C, \\(2-\\sqrt{19}\\). On a number line, moving left means subtracting the distance from the starting coordinate. Starting at 2 and moving \\(\\sqrt{19}\\) units left gives \\(2-\\sqrt{19}\\). Option C is therefore correct. Option A, \\(2+\\sqrt{19}\\), represents moving right, not left. Option B, \\(\\sqrt{19}-2\\), reverses the subtraction and does not describe the coordinate obtained from 2. Option D, \\(-2-\\sqrt{19}\\), starts from -2 rather than from 2, so it moves from the wrong point. Since \\(\\sqrt{19}\\approx4.36\\), the coordinate is about -2.36, which confirms that it is to the left of 2. Direction decides the sign: left subtracts, right adds.

Related tags

Number-LineDirectionCoordinate

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