120 Old Faithful Geyser Wait Time y=12.643x+32.036 100 80 80 60 Wait Interval (min) 60 60 40 40 20 0 0 1 2 3 4 5 Duration of Previous Eruption (min) The regression equation for the scatterplot is y = 12.643x + 32.036 which is a linear model. We can use this equationto predict and problem solve. If the previous eruption was 3:15 minutes long, how long should we expect to wait until the next eruption minutes If we've been waiting 60 minutes between eruptions, how long was the previous eruption? minutes