write 1 1/2 and 2 1/4 on the number line below.

Answer:
So lets convert the fractions to improper:
3/2 and 9/4
And for it to be easier to plot, make them decimals (divide):
1.5 and 2.25
The step here is 0.125 (1/8 (the amount of lines between a number))
Plot: