A random sample of federal income tax returns is selected from the 2006 returns and a frequency histogram is constructed for the amount of federal income tax paid in 2006. The classes used to construct the histogram are $0 \leqslant 3000,3000 \leqslant 6000,6000 \leqslant 9000$, and so on. What do you think the shape of the histogram will be? Explain your thinking.

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The Answer of A random sample of federal income tax returns is selected from the 2006 returns and a frequency histogram is constructed for the amount of federal income tax paid in 2006. The classes used to construct the histogram are $0 \leqslant 3000,3000 \leqslant 6000,6000 \leqslant 9000$, and so on. What do you think the shape of the histogram will be? Explain your thinking.

A Random Sample of Federal Income Tax Returns Is Selected 0⩽3000,3000⩽6000,6000⩽90000 \leqslant 3000,3000 \leqslant 6000,6000 \leqslant 90000⩽3000,3000⩽6000,6000⩽9000

A Random Sample of Federal Income Tax Returns Is Selected $0 \leqslant 3000,3000 \leqslant 6000,6000 \leqslant 9000$