Round these decimals to 2 decimal places.
a) 4.148
b) 5.092
c) 0.458
d) 17.315

If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up (+1).

If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down (no change).

a) 4.148 ≈ 4.15
b) 5.092 ≈ 5.09
c) 0.458 ≈ 0.46
d) 17.315 ≈ 17.32

The vertex of the quadratic function is (1.5, -.75)