A parabola opening up or down has vertex (0,0) and passes through (4,2). Write it’s equation in vertex form

Equation in vertex form, y= (-1/4) x² + 4

Step-by-step explanation:

 we have the equation,

y = ax² + 4     ( we need to find "a")

Now we have,

   2 = a(4)2 + 4

   2 = a (8)+ 4

   2-4 = 8a

   -2= 8a

   a= -1/4

Substituting the value of "a" in the equation,  we have

           y = (-1/4)(x- 0)² + 4  (or) y= (-1/4) x² + 4

 The parabola is opens downward. Therefore the vertex is above the x-axis and then the parabola passes through a point below the x-axis.

       Equation in vertex form= y= (-1/4) x² + 4

answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.