Amirror with a parabolic cross section is used to collect sunlight on a pipe located at the focus of the mirror. the pipe is located 7 inches from the vertex of the mirror. write an equation of the parabola that models the cross section of the mirror. assume that the parabola opens upward. a y=1/28x^2 b y=1/42x^2 c y=1/35x^2 d y=1/49x^2

Step-by-step explanation:

A mirror with a parabolic cross section is used to collect sunlight on a pipe located at the focus of the mirror.

The pipe is located 7 inches from the vertex of the mirror.

The parabola is open upwards . the vertex of the parabola is (0,0)

and pipe is located 7 inches from the vertex (0,0)

7 inches is the focus of the mirror

The distance between the vertex and the focus = 7

Since parabola is upwards and vertex is (0,0) we use formula

Where p is the distance between the vertex and focus

p = 7 we know

Now isolate y by dividing 28 on both sides

1     3    

step-by-step explanation:

hopefully im right

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.