Question

The line of symmetry of the parabola whose equation is y = ax^2 - 4x + 3 is x = -2. What is the value of "a"?



-2

-1

-1/2

Answer 1

first coordinate of the vertex, and also the "axis of symmetry" is given by
\[x=-\frac{b}{2a}\]
in your case \(b=-4\) and the answer is \(-2\) so you can set
\[-\frac{-4}{2a}=-2\] and solve for \(a\)

Answer 2

really you would write \[\frac{2}{a}=-2\] and solve that for \(a\)

Answer 3

-1!

Answer 4

oui

Answer 5

yes?

Answer 6

lol yes