Answer: The exponential equation 2(1/5)^x - 5 and the equation y=2x represent two different types of mathematical functions.
The first equation is an exponential function, where the variable x is the exponent and the constant 2(1/5) is the base. This function shows an exponential decay, where the value of the function decreases as x increases. The constant -5 shifts the entire function down along the y-axis.
The second equation is a linear function, where the variable x is the input and the constant 2 is the slope. This function shows a constant rate of change, with y increasing by 2 units for every unit increase in x.
In summary, the main difference between the two functions is that the exponential function represents exponential growth or decay, while the linear function represents a constant rate of change.