How would you do this problem? it gives me the right answer but i need to show my work.

What is the multiplicative rate of change of the exponential function shown on the graph?

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.