If you are saying 657/3 its 219 but 3/657 is 0.00456621004
it would be 1 and half hours if it is split equally.
The square root of 500 is 22.3
(48.15 - 45) / 45 = 3.15 / 45 = 0.07 = 7% <== rate of sales tax
Proportional and linear functions are almost identical in form. The only difference is the addition of the “b” constant to the linear function. Indeed, a proportional relationship is just a linear relationship where b = 0, or to put it another way, where the line passes through the origin