Provide an Appropriate Response $\mathrm { y } = \mathrm { f } ( \mathrm { x } )$

Essay

Provide an appropriate response.
-A function $\mathrm { y } = \mathrm { f } ( \mathrm { x } )$ is continuous on $[ - 1,1 ]$ . It is known to be positive at $x = - 1$ and negative at $x = 1$ . What, if anything, does this indicate about the equation $f ( x ) = 0$ ? Illustrate with a sketch.