Final answer:
The slope of the line is 3, the y-intercept is 9, and the equation of the line is y = 3x + 9.
Step-by-step explanation:
The slope of a line is a measure of how steep the line is. In the given figure, the slope is 3, which means that for every increase of 1 on the horizontal axis, there is a rise of 3 on the vertical axis. The y-intercept is the value of y when x=0, and in this case, the y-intercept is 9.
Therefore, the equation of the line can be written as y = 3x + 9. The coefficient of x (3) represents the slope, and the constant term (9) represents the y-intercept.