Question

The graph of the function f(x) = ax2 + bx + c is a parabola opening up and passing through the point (0, -2) Which of the following must be true?a. a < 0 and c > 0
b. a > 0 and c > 0
c. a > 0 and c < 0
d. a < 0 and c < 0

Answer 1

f(x) = ax2 + bx + c
you told me (0,-2) lies on it, so
-2 = 0 + 0 + c

since it opens up, a > 0 and we can see c < 0 so .....