Question

Suppose f(x) = x^2 - 3 x - 1.
Find the following information for this function.

The coordinates of the vertex are?
This parabola is what? concave up,down or both or neither

Answer 1

vertex ( 3/2, -1)
concave up - remember that F(x)= ax^2 + bx + c. concave direction is based on the sign of A - if negative: concave down and if positive : concave up

Answer 2

the y intercepts occur at?

Answer 3

FIND THE axis of symmetry by x = -b/2a
vertex is -b/2a, f(-b/2a)

Answer 4

wait I now its a parabola and it contains a minimum but how do I find that?

Answer 5

min is calculatd by y >= f(-b/2a)

Answer 6

ok so what is b and a?

Answer 7

3/2 and -1?

Answer 8

F(x)= ax^2 + bx + c standard
f(x) = x^2 - 3 x - 1 your problem
so a = 1
b = -3
c = -1

Answer 9

oh ok

Answer 10

quadratic equation right?

Answer 11

yes

Answer 12

my son is learning this now and i just taught him - that is why i can answer so quick

Answer 13

oh ok