added car pic for math sample in Linear Motion session
added car pic for math sample in Linear Motion session

wdonray/aieBoostrap,AcademyOfInteractiveEntertainment/aieBootstrap,AcademyOfInteractiveEntertainment/aieBootstrap,wdonray/aieBoostrap,intrepid249/Bootstrap-MathDemo,doddzy39/aieBootstrap,intrepid249/Bootstrap-MathDemo,doddzy39/aieBootstrap