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The vertical line x = -3 passes through the x-axis at which point?
A(0, -3)
B(3, 0)
C(0, 3)
D(-3, 0)
Answer & Solution
Correct answer: D. (-3, 0)
1. A vertical line x = a always passes through the x-axis at the point (a, 0).
2. For the line x = -3, substituting a = -3 gives the point (-3, 0).
3. Swapping the coordinates to (0, -3) would instead describe a point on the y-axis, not the x-axis.
_Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 4 "Graphs", section 4.2 Graph Linear Equations in Two Variables_
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