Select the x-coordinate of the vertex of the parabola defined by the function f(x) = -3x2 + 7x + 5.

Question

Select the x-coordinate of the vertex of the parabola defined by the function f(x) = -3x2 + 7x + 5.

Answer 1

Hi Trisha,
 
when you have an equation in this form you can find the x value of the vertex as follows
 
x = -b/2a
 
where b is the coefficient of x
 
and a is the coefficient of x2
 
in this case b = 7 and a = -3
 
x = -7/2(-3)
 
x = 7/6
 
Hope this helps