A set of 8 data points is plotted along with the line $y=5-\frac{1}{2}x$. For how many of these points does the line predict a smaller $y$-value than the actual $y$-value?

The points are: $(0,4),(1,4.5),(2,3),(3,3.5),(4,2),(5,1),(6,1.5),(7,0)$.