i. The equation of a line parallel to the y-axis and passing through (3, 1) is y = 1. ii. The equation of a line with slope −3 and y-intercept 3 is 3x + y = 3.

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Only (ii) Explanation: ⇒ Going through (i) statement, • A line parallel to the y-axis is vertical. • The equation for a vertical line is always x = constant. • Since the point is (3, 1), the correct equation is x = 3. So, the statement is invalid. ⇒ Going through (ii) statement, Using the slope-intercept form y = mx + c • Slope (m) = −3 • y-intercept (c) = 3 Equation: y = −3x + 3 Rearrange it, 3x + y = 3 So, the statement is valid.

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