1. Which pair of equations both state that the variable $R$ is proportional to the variable $h$?
2. The following pairs of values $(h, k)$ are recorded: $(3, 9), (6, 18), (8, 24), (12, 36)$. Are the variables $h$ and $k$ proportional? If so, identify the equation relating them.
3. Property tax is proportional to property value at a rate of 2.5%. How much tax will Gareth pay on his cabin, which is valued at 50,000 dollars? Gareth will pay ___ dollars in tax.
4. Does the equation $S = \frac{13m}{7}$ describe a proportional relationship between $S$ and $m$?
5. Complete the statement: $T$ is proportional to $w$ if their ___ is constant.
6. The following pairs of values $(B, d)$ are recorded: $(3, 0.6), (4, 0.8), (6, 1.2), (9, 1.8)$. Are the variables $B$ and $d$ proportional? If so, identify the equation relating them.
7. The following pairs of values $(Y, V)$ are recorded: $(2, 4), (3, 9), (5, 25), (8, 64)$. Are the variables $Y$ and $V$ proportional?
8. The following pairs of values $(H, t)$ are recorded: $(2, 0.5), (4, 0.25), (5, 0.2), (10, 0.1)$. Are the variables $H$ and $t$ proportional?
9. The following pairs of values $(C, R)$ are recorded: $(1, 15), (3, 35), (6, 65), (12, 125)$. Are the variables $C$ and $R$ proportional?
10. Trish’s real-estate commission is proportional to the sale amount. She earned a 3200 dollars commission on an 80,000 dollars sale. Which equation relates her commission, $C$, to her sales, $S$?