A quadratic graph opens upwards and its entire curve lies above the -axis

MATHEMATICS · Single correct · A Level · Mathematics · Algebra and Functions · Algebra and Functions

Problem

A quadratic graph opens upwards and its entire curve lies above the

x

-axis. Which statement about its discriminant

D

is correct? (a)

D>0

(b)

D<0

(c)

D=0

(d)

D

cannot be determined from the given information