A scatterplot shows data points generally increasing from left to right. The points are clustered around a line that appears to cross the y-axis at approximately (0, 4). For example, some points are roughly (1, 6), (3, 10), and (7, 17).
Which of the following could be the equation for a line of best fit for the data shown in the scatterplot?
y = 2x + 4
y = -2x + 4
y = 0.5x + 4
y = 2x - 4