Which of the equations below could be the equation of this parabola?

we know that

the equation of the graph is a horizontal parabola

the equation of a horizontal parabola is of the form

-------> negative because open to the left

where

(h,k) is the vertex of the parabola

in this problem we have

Substitute in the equation above

therefore

the answer is

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.