The intervals along the x axis are inconsistent. the one that says 21-30 should either be split into 2 or have twice the width.
Hope this helps :)
The total cost for a $1,200 washing machine is $1,200. In the real world it would be 1,200 + tax.
- 1/3 - 1 2/3 = - 2
When subtracting two negatives you add the two numbers together.
Taking 20 away from 50 will result in 30