 We're going to continue looking at linear equations with two variables and talk about some applications. The median annual income for women with a master's degree is given by the equation y is equal to 1,335x plus 35,660, where x is the number of years after 1991. And it says find the y-intercept and interpret its meaning. Well remember that here's our equation and we said that the constant was always going to be our y-intercept if it was a y-equal equation. So our y-intercept is going to be 0,35,660. Now remember that x, it told us, is the number of years after 1991. So it's zero years after 1991. And this, the y value, is what the problem is talking about and that's talking about the median annual income. So we'll just say income. So if we put that all together then we can say that in 1991, that's year zero, the median income was 35,660. So let's do the same problem but it's going to ask us to find the median annual income for women in 2001. Well we know that in 1991, that's year zero. So if we subtract our 1991 from our 2001, we find out that x is equal to 10. So we can work with our problem and say that it's 1,335 times 10, which is our x, plus 35,660 and that's equal to our y. So we can say that y is equal to, we add a zero here, 1,000, or 13,000 now, 350, plus 35,660. And if we add those together, we get 40,000, 9,010.