How can I solve this using my calculator?

Let's begin by looking at the US prison population numbers from the past 50 years and t a linear model to this data. Data on US Prison Population over Time 1970 1980 1985 1990 2000 2014 2016 2019 p "5" 357, 292 513 900 759,100 1 179, 200 2,015,300 2 306 200 2, 298, 300 2 267 000 Population a)What IS the equation of the LSRL? (b) When do we predict the prison population reached one and a half million? (c) Interpret the slope of the regression line in the context of the