Algebra 1

a) (0,2) b) $x = -2.5$ c) $b = 5$ d) $x^2+5x+2$ e) Please see the work below to show the equation is correct. f) No--we had to calculate $b$ and $c$
a) The graph crosses the y-axis at (0,2) b) $(-1+-4)/2 = -5/2 = -2.5$ c) $-2.5 = -b/2a$ $-2.5 = -b/2$ $-2.5*-2 = -b/2*-2$ $5 = b$ d) $b=5$, $c=2$ e) $x^2+5x+2=y$ $y = (-1)^2+5*(-1)+2$ $y = 1-5+2$ $y= -2$