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What is the equation of the line passing through (2, –3) and parallel to the y-axis ?(a) y = –3 (b) y = 2 (c) x = 2 (d) x = – 3 |
Answer» (c) x = 2 Slope of y-axis = tan 90º (∵ y-axis ⊥ x-axis) ∴ Equation of line passing through (2, –3) parallel to y-axis is (y + 3) = tan 90º (x – 2) ⇒ (y + 3) = ∞ (x – 2) ⇒ (x – 2) = \(\frac{1}{\infty}\) (y + 3) = 0 ⇒ x = 2. |
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