Scientists are conducting an experiment with a gas in a sealed container. The mass of the gas is measured, and the scientists realize that the gas is leaking over time in a linear way. Its mass is leaking by $6.1$ grams per minute. Six minutes since the experiment started, the remaining gas had a mass of $219.6$ grams. Let $x$ be the number of minutes that have passed since the experiment started, and let $y$ be the mass of the gas in grams at that moment. Use a linear equation to model the weight of the gas over time.

1. This line’s slope-intercept equation is .
2. $40$ minutes after the experiment started, there would be grams of gas left.
3. If a linear model continues to be accurate, minutes since the experiment started, all gas in the container will be gone.