10
Answer: ASet 10: Linear Functions
Explanation
Which graph shows a line with an undefined slope?
A.✓ Correct
A vertical line
B.
A horizontal line
C.
A line rising to the right
D.
A line falling to the right
Detailed Explanation
Choice A is correct. Choice A is the correct answer. Vertical lines have undefined slope. 1. Definition: Slope is rise/run. Vertical lines have 0 run. 2. Result: Division by zero is undefined. Strategic Tip: Vertical = Undefined. Horizontal = Zero. Choice B is incorrect because slope is 0. Choice C is incorrect because slope is positive. Choice D is incorrect because slope is negative.
Key Steps:
•
The correct answer is A vertical line
Why others are wrong:
B: Choice B is incorrect and may result from a calculation error.
C: Choice C is incorrect and may result from a calculation error.
D: Choice D is incorrect and may result from a calculation error.
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