CPM Homework Help : CALC Problem 11-73

Multiple Choice: The slope field shown below is the graph of:

$\frac { d y } { d x } = - x$

$\frac { d y } { d x } = y$

$\frac { d y } { d x } = - y$

$\frac { d y } { d x } = \frac { 1 } { y }$

$\frac { d y } { d x } = \frac { x } { y }$

Hint:

When is the slope $0$ ? Which equation could this match?
When are the slopes positive? When are the slopes negative?
Which equation could these situations match?