The answer is y = -3/2 + 3.
This is based on the formula y = mx + b where m is the slope and b is the y-intercept.
Based on the graph, the y intercept (B) is 3 because it passes through the point (0,3) on the y-axis.
The slope is represented by rise/run, or change in y value/change in x value. If you look at the graph, the next point after (0,3) is (2,0). Therefore the change in the y value is is -3, and the change in the x value is 2, so the slope (m) is -3/2.
That would make the equation:
Y = -3/2 + 3.