Question

For all functions of the form f(x) = ax^2 + bx + c, which is true when b = 0?

a) The graph will always have zero x-intercepts.
b) The function will always have a minimum.
c) The y-intercept will always be the vertex.
d) The axis of symmetry will always be positive.

Answer 1

im thinking A but im not sure, im not good at quadratic functions

Answer 2

it's not.

Answer 3

d

Answer 4

axis of symmetry depends on the minimum of the curve

Answer 5

yes

Answer 6

but that doesnt mean the curve is positive if b=0,i would suggest ya to plot out (x-1)^2
look at the graph and you will find the answer

Answer 7

it will always be the vertex