$\"\"$

The equation of a parabola is $\"\"$ .

Since the square term is $\"\"$ , the parabola is horizontal.

Standard form of the horizontal parabola is $\"\"$ , where $\"\"$ is vertex.

Compare the above equation with $\"\"$ .

$\"\"$

$\"\"$ .

Since $\"\"$ is negative, the parabola opens left.

$\"\"$

The square term is $\"\"$ , the parabola is horizontal.

$\"\"$ is negative, the parabola opens left.