Question

On a coordinate plane, a parabola opens down. It goes through (negative 2, negative 2), has a vertex at (1.5, 10), and goes through (5, negative 2).
Over which interval is the graph of f(x) = –x2 + 3x + 8 increasing?
(–[infinity], 1.5)
(–[infinity], 10.25)
(1.5, [infinity])
(10.25, [infinity])

Answer 1

Answer:

A or D

its not B or C