Question

Use the graphing calculator to graph the function f(x) = –StartRoot x EndRoot. Which list contains three points that lie on the graph of the function?

(–9, 3), (–4, 2), (–1,1)
(1,1), (4, 2), (9, 3)
(–9, –3), (–4, –2), (–1,–1)
(1,–1), (4, –2), (9, –3)

Answer 1

f(x) = −√x is only defined for x ≥ 0 and gives negative (or zero) y-values.
f(1) = −1, f(4) = −2, f(9) = −3, so the correct list is (1, −1), (4, −2), (9, −3).