Question

Luciano can type 190 words in 5 minutes. Which of the following ratios are in a proportional relationship with Luciano's typing speed?

Select all that apply.


38/1

74/2

230/45

290/105

570/15

950/25

Answer 1

• 38/1
• 570/15
• 950/25

Explanation:

The given rate, in words per minute, is ...

(190 words)/(5 min) = 38 words/min

The offered ratios are ...

38/1 = 38 . . . . proportional

74/2 = 37 . . . . NOT proportional

230/45 ≈ 5.11 . . . NOT proportional

290/105 ≈ 2.76 . . . NOT proportional

570/15 = 38 . . . . proportional

950/25 = 38 . . . . proportional