(Solved): 7. Below are graphs of combinations of two functions from \( x, x^{2}, \sin x, \cos x, 2^{x} \) and ...

7. Below are graphs of combinations of two functions from \( x, x^{2}, \sin x, \cos x, 2^{x} \) and \( \log x \) and one of the basic operations: addition, subtraction, multiplication and division. Determine an equation for each graph. Support your equation with a mathematical justification in part a) and 2 mathematical justifications in part b). Note that the graph in part b) will also contain a transformation. [APP \( -2 \) marks, THINK \( -3 \) marks] b)