Chapter 2 - Functions, Equations, and Graphs - 2-1 Relations and Functions - Practice and Problem-Solving Exercises - Page 67: 43

1.9, $\sqrt 3$, $\frac{5}{4}$, -1.2

We convert all the numbers to decimals to make them easier to compare: $1.9=1.9$ $\frac{5}{4}=1.25$ $-1.2=-1.2$ $\sqrt 3 \approx 1.73$. We can see that 1.9 is the greatest, followed by 1.73, 1.25, and -1.2.