Project 14: Finding Directrix and Focus from Equation
Project 14: Variables 'verticalParabola', 'a', 'vX', 'vY' have been initialized.
verticalParabola is true if the parabola opens up/down and false if the parabola opens left/right
a is the leading coefficient of the parabola
vX is the x-coordinate of the vertex
vY is the y-coordinate of the vertex
Task: Appropriately initialize 'directrix', 'focusX', 'focusY'
Some examples are shown below:
Given:
verticalParabola = true
a = .5
vX = 3
vY = 4
The following would be initialized:
p = .5 (not required) since a = ± 1/(4p)
focusX = 3
focusY = 4.5
directrix = 3.5 (which represents y = 3.5)
Given:
verticalParabola = false
a = -1
vX = -5
vY = -4
The following would be initialized:
p = .25 (not required) since a = ± 1/(4p)
focusX = -5.25
focusY = -4
directrix = -4.75 (which represents x = -4.75)
**If your code works for 5 test cases in a row, you can enter your e-mail address.