Chapter 10 - Conics, Parametric Equations, and Polar Coordinates - Review Exercises - Page 742: 3

$${\text{Graph}}\left( {\text{b}} \right)$$

$$\eqalign{ & {y^2} = - 4x \cr & {y^2} = - 4x \cr & {\text{The equation is written in the form }}{y^2} = 4px \cr & - 4x = 4px \Rightarrow p = - 1 \cr & p < 0,{\text{ then the parabola opens to the left}} \cr & {\text{Graph}}\left( {\text{b}} \right) \cr} $$