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?
21 words/min
29 words/min
56 words/min
64 words/min

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?
21 words/min
29 words/min
56 words/min
64 words/min

anonymous · Answer

If y equals word per minute, and x represents years owned, you can plug 3 in for x. 
y = 3.8(3) + 17.4 so just simplify it and you get your answer

anonymous · Answer

@bfonse03 if you simplify it you should get 29 wpm, or answer B

anonymous · Answer

@Presentence yeah tank you:)