Final answer:
To model a 159% increase in enrollment on a 10x10 grid, you would need to shade 159 squares.
Step-by-step explanation:
To model a 159% increase in enrollment on a 10x10 grid, we need to determine how many squares would be shaded.
To calculate this, we need to first find the total number of squares on a 10x10 grid, which is 100.
Then, we can find the number of shaded squares by multiplying the total number of squares by the percentage increase: 100 x 1.59 = 159.
Therefore, there would be 159 squares shaded on the 10x10 grid to model the 159% increase in enrollment.