The temperature drops from 80 to 74 to 68 to 62, so it decreases by 6°C each minute. A linear expression has the form initial value $+$ rate$\times$time. The initial temperature at $t=0$ is 80, and the rate of change is $-6$ because the temperature is going down. Therefore, the expression is $80-6t$.

Because the relationship is proportional, the ratio of practice questions to hours studied must stay constant. From the point $(3,24)$, the unit rate is $\frac{24}{3}=8$ questions per hour. A point on the graph must satisfy $y=8x$. For choice A, when $x=1$, $y=8(1)=8$, so $(1,8)$ must be on the graph.

Let the total charge be $y=mx+b$, where $m$ is the cost per package and $b$ is the fixed service fee. From the table, increasing the number of packages from 2 to 5 adds 3 packages, and the total charge increases from 11 to 20, which is $20-11=9$ dollars. So the cost per package is $m=\frac{9}{3}=3$ dollars.

Now use the row with 2 packages: $11=3(2)+b$. This gives $11=6+b$, so $b=5$.

For 8 packages, the total charge is $y=3(8)+5=24+5=29$. So the correct answer is $29$.

The number of fish increases by $12$ each month: $60-48=12$, $72-60=12$, and $84-72=12$. Continuing the pattern, month 5 has $84+12=96$ fish, and month 6 has $96+12=108$ fish. Therefore, the correct answer is $108$.

For a rectangle, $\text{area}=\text{length}\times \text{width}$. So $\text{width}=\frac{\text{area}}{\text{length}}$. Using any row from the table, for example Flower Bed 1: $\frac{40}{8}=5$. Checking the others: $\frac{30}{6}=5$ and $\frac{50}{10}=5$. The common width is $5$ feet.