Question

For several years, Graham has gathered data on students who own a computer and on their performance on a typing-speed test. He creates the linear model y = 3.8x + 17.4 where y represents the typing speed, in words per minute, of a student and x represents the number of years the student has owned a computer. According to Graham’s model, what is the approximate speed of a student who has owned a computer for three years?

Answer 1

B) 29 words/min

Explanation:

Equation : y = 3.8 (x) + 17.4

The 'X' value equals the three years (3 years)

___________________________________________

New Equation: y = 3.8 (3) + 17.4

Step 1: 3.8 (3) = 11.4

Step 2: 11.4 + 17.4 = 28.8

Step 3: ROUND YOUR ANSWER TO THE NEAREST TEN!!!! So, 28.8 then becomes 29.

Step 4: Therefore, your answer is B) 29 words/min

Answer 2

29 words/min

Explanation:

y = 3.8x + 17.4

y = (3.8 x 3) + 17.4

y= 11.4 + 17.4

y = 28.8 --- 29 words