Question

1. out of 30 students surveyed, 17 have a dog. based on these results, predict how many of the 300 students in the school have a dog? (example 1)

Explanation:

Step1: Set up proportion

Let $x$ be the number of students in the school with a dog. The proportion is $\frac{17}{30}=\frac{x}{300}$.

Step2: Cross - multiply

$30x = 17\times300$.

Step3: Solve for $x$

$x=\frac{17\times300}{30}=170$.

Answer:

170