Chapter 10 - Systems of Equations and Inequalities - Section 10.6 Systems of Nonlinear Equations - 10.6 Assess Your Understanding - Page 794: 4

See graph for $x^2+4y^2=4$

1. For $x^2+4y^2=4$ or $\frac{x^2}{4}+y^2=1$, we can identify that it is an ellipse centered at $(0,0)$ with a horizontal major axis and $a=2, b=1$ 2. Known its vertices at $(2,0),(-2,0),(0,1),(0,-1)$ and the above information, we can graph the equation.