## anonymous 4 years ago Identify the vertex, axis of symmetry, and min/max value of each. f(x) = -2x^2 - 36x -164 f(x) = -7x^2 + 14x - 15 f(x) = -6x^2 + 12x - 4 f(x) = 10x^2 - 100x +240

1. anonymous

each of these works the same way. find $-\frac{b}{2a}$ and that will be the first coordinate of the vertex. second is what you get by substitution

2. anonymous

$f(x) = -2x^2 - 36x -164$ $-\frac{b}{2a}=-\frac{36}{4}=-9$ $f(9)=-2$ range is $(-\infty, -2]$

3. anonymous

$f(x) = -7x^2 + 14x - 15$ $-\frac{b}{2a}=\frac{14}{2\times 7}=1$ $f(1)=-8$ vertex is $(1,-8)$ range is $(-\infty, -8]$

4. anonymous

What do you mean by 'range'?