Question

Write an equation of a parabola that opens to the right, has a vertex at the origin, and a focus at (7,0)

a. x=1/16y^2
b. y=1/12x^2
c. x=1/28y^2
d. y=1/8x^2

Answer 1

Is it a function of x or y? (remember the definition: f(x)=y: for every x from domain, there is one value of f(x) from range. For f(y)=x vice versa.
What is the ratio for focus? (in this case, which of those numbers relates 'logically' to 7?)

Answer 2

Not so sure :/