Set 15: Linear Functions (Advanced)

Choice A is correct. Choice A is the correct answer. Diagonal lines. 1. Diagonal ($m \neq 0$): Goes up and down forever. Range is $(-\infty, \infty)$. 2. Horizontal ($y=5$): Range is just $\{5\}$. 3. Vertical ($x=3$): Range is $(-\infty, \infty)$ but it's not a function. Strategic Tip: Any non-horizontal linear function covers all y-values. Choice B is incorrect. Choice C is incorrect because not a function. Choice D is incorrect.