Question

use the table below to answer questions 1 - 4.
minutes 0 3 6 9 12
words typed 0 120? 360 480

1. kenny is practicing for a typing test to obtain a job as a paralegal. the number of words he can type is proportional to the number of minutes. if the test is 18 minutes long, how many words will kenny be able to type?

Explanation:

Step1: Find the typing - rate

Since the number of words typed is proportional to the number of minutes, and in 3 minutes, 120 words are typed. The typing - rate $r$ (words per minute) is calculated by the formula $r=\frac{w}{t}$, where $w$ is the number of words and $t$ is the time in minutes. So, $r = \frac{120}{3}=40$ words per minute.

Step2: Calculate the number of words for 18 minutes

Using the formula $w = r\times t$, with $r = 40$ words per minute and $t = 18$ minutes. Then $w=40\times18 = 720$ words.

Answer:

720