Determine the points where the parametric curve x =

Question

Determine the points where the parametric curve x =  - 3t, y =  - 12t have horizontal and vertical tangents.
A) horizontal tangents at (2, 11), (-2, -11) and vertical tangents at (2, -16), (-2, 16) 
B) horizontal tangent at (0, 0) 
C) vertical tangent at (0, 0) 
D) horizontal tangents at (2, -16), (-2, 16) and vertical tangents at (2, 11), (-2, -11) 
E) no horizontal or vertical tangents

Quizplus · Accepted Answer

The Answer of Determine the points where the parametric curve x =  - 3t, y =  - 12t have horizontal and vertical tangents.
A) horizontal tangents at (2, 11), (-2, -11) and vertical tangents at (2, -16), (-2, 16) 
B) horizontal tangent at (0, 0) 
C) vertical tangent at (0, 0) 
D) horizontal tangents at (2, -16), (-2, 16) and vertical tangents at (2, 11), (-2, -11) 
E) no horizontal or vertical tangents