Slope empowers you to predict the future; not perfectly, but better than those around you who do not understand slope.
Do you like hiking? Would you consider hiking some or all of the Appalachian Trail someday? Slope empowers you to predict how many days it will take you, how much food, water, and other provisions to pack between supply points. So you are not carrying too much and getting tired, neither do you go hungry.
Do you want to drive a car someday? Slope empowers you to predict how long a tank of gas will last, how often to have the car serviced. If you take a trip, slope empowers you with metrics to choose whether to drive, take a train, or fly. If you drive for a multi-day trip, slope empowers you to plan the trip, make hotel reservations along the way.
Do you like sports? Do you play hockey? Slope empowers you to predict how long of a shift you can expect to endure, how many times you will get on the ice, how to pace yourself through a game, how to train yourself to be ready to play.
Do you ever eat at a restaurant? Slope empowers you to be the one that figures out the tip.
Do you ever go shopping? Have you ever been at a cash register in a store when the power was out, and watched a committee of people discuss how to calculate the sales tax (I have)? Slope empowers you to check whether they charged the correct amount or not.
Do you ever have to make a choice between two or more competing options? Slope empowers you to quantify the relative benefits of each option, and compare them.
Do you expect to live outside your parents care? Slope empowers you to look at your income and predict what a useful budget would be, understand how much of a rent or mortgage payment you can afford, how much of a car you can buy, detect when a credit card company, or a contractor, or your representatives, or your government, are trying to rip you off or pull the wool over your eyes. Slope empowers you to predict whether you need a twenty-six-foot U-Haul, or can get by with the cheaper sixteen-footer when you move house.
Do you expect to have a job someday? Are you considering becoming a doctor, or a nurse? Slope empowers you to determine correct drug dosages, which can be a life or death matter. Might you start a business? Slope empowers you to develop a rational business model, understand trends, see and sieze opportunities. Are you an artist? Slope empowers you to purchase enough materials to complete an artwork and not waste material.
Do you wonder about how accurate your slope-driven predictions are? Slope empowers you to estimate their accuracy, and to add some margin to the prediction and allow for contingencies, so you can get to your hotel on that road trip before midnight even if you have a flat tire.
When someone asks a question, and everyone else around you looks at them blankly and blinks, if you know something about the topic, then slope empowers you to suggest a possible answer.
Have you ever gotten an incorrect answer from Google, or a ridiculous drive time from Google Maps? Slope empowers you to know that the answer you get is unreasonable or impossible.
Are you a procrastinator? Slope empowers you to goof off as much as possible and predict the latest you absolutely must start a task.
Slope is the Holy Grail, and is being handed to you on a silver platter; it is a serious mistake to blow it off.