Solve Ray Tracing Problem: Image Location for 6.3 cm from Convex Mirror

[BuBbLeS01]

Ray Tracing...HELP!

Homework Statement

An object is 6.3 cm from a convex mirror with a focal length of 10 cm. Use ray tracing to determine the location of its image.

Homework Equations

The Attempt at a Solution

1/f = 1/s + 1/s'
1/f - 1/s = 1/s'
1/10 - 1/6.3 = -0.0587 cm ^ -1 = -17.027 cm

what am I doing wrong?

 

[BuBbLeS01]

got it!