Question

Jordan types at a constant rate of 40 words per minute. The number of words typed, y, is a function of the number of minutes spent typing, x.

1.Which equation models this situation?
y=40x

y=40x

y=x+40

y=x40

2.Use the equation you choose from Part A to determine the number of words Jordan types in 7.5 minutes.

Jordan types ___words in 7.5 minutes.

Answer 1

1. y = 40x

2. Jordan types 300 words in 7,5 minutes

Explanation:

Just multiply

Answer 2

1. y = 40x

2. Jordan types 300 words in 7.5 minutes

Explanation:

After 1 minutes (x = 1), Jordan will have typed 40 words. After 2 minutes (x = 2), he'll have typed 40(2) = 80 words. In general then, Jordan will have typed 40x words after x minutes, and if we let y be the number of words typed, the equation y = 40x models our situation.

To find his word count after 7.5 minutes, we can just plug in x = 7.5:

y = 40(7.5) = 300 words.