The diagram shows part of a straight line obtained by plotting log_{10 }y against log_{10 }x for two variables x and y. Find
a) log_{10 }y in terms of log_{10 }x
b) y in terms of x
c) the valve of x when y = 40
Hint: The "log(y) and log(x)" act as y and x values. So your line on the graph will be of the form: , where m and b are the usual slope of the line, and b is the y-intercept.