If you have an equation of a straight line in the form y = m*x + c where m and c are constants then the slope is given by m and the y-intercept is given by c. In this case m = 3, so that is the slope of your line.
If you have an equation of a straight line in the form y = m*x + c where m and c are constants then the slope is given by m and the y-intercept is given by c. In this case m = 3, so that is the slope of your line.