Question

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Answer 1

In a parabola that opens left o right the variable y is squared, then Options A and B are not possible.
The option C is the Vertex form

Answer: Option D. x=ay^2+by+c

Answer 2

The standard equation of a parabola by definition is given by:
x = ay2 + by + c
Where,
a, b, c are the coefficients of the equation
y is the independent variable
x it is the dependent variable.
Answer:
The standard equation of the parabola is:
x = ay2 + by + c
option D