Question

1. Identify the vertex for the graph of y = −3x2 − 6x + 4.
(1, 13)
(−1, 13)
(1, 7)
(−1, 7)

Answer 1

y = −3x^2 − 6x + 4.
In this equation, a = -3 and b = -6.

The x coordinate of the vertex can be found by evaluating x = -(b)/[2(a)] for a = -3 and b = -6. Crank out the value of x and see what you get.

You can then substitute that value of x into the equation y = −3x^2 − 6x + 4 and find the y-value of the vertex.

Answer 2

x = -(-6)/[2(-3)] = -1 @isabellaxo Did you get -1 for x?