[hknapp]

y = m * x + b

can refer to the distance a car has traveled over time at a fixed speed with a starting point as well as the cost of ordering a certain quantity of an item with a fixed shipping cost

that's my best attempt at an example

[Ma8ee]

That is better than I managed to come up with on short notice.

[hknapp]

Thanks. It was inspired by an Uncle Bob example.