The equation is .

Write equation in standard form .

Vertices: (a, 0) = (6, 0) and (-a, 0) = (-6, 0)

Co-vertices: (0, b) = (0, 4) and (0, -b) = (0, -4).

Equations of asymptotes: .

Graph :

 Testing for Symmetry:

x-axis:

The equation is .

Replace y with -y.

Result is an equivalent equation.

y-axis:

The equation is .

Replace x with -x.

Result is an equivalent equation.

Therefore, the graph

The function is y = cos(x).

The equation is .

Write equation in standard form .

Vertices: (a, 0) = (4, 0) and (-4, 0) = (-6, 0)

Co-vertices: (0, b) = (0, 3) and (0, -b) = (0, -3).

Major axis = 2a = 2(4) = 8

Minor axis = 2b = 2(3) = 6

Graph :

 Testing for Symmetry:

x-axis:

The equation is .

Replace y with -y.