Question

can you help me out please ASAP

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

Answer 1

I'll do the first, or try that is...
y=3.8x + 17.4
21=3.8(3)+17.4
21=11.4+17.4
21=28.8
=28.8-21
=7.8

I'm not sure about it though

Answer 2

ohhh, wait i think how i know how to

you go,
y=3.8x + 17.4
y=3.8(3)+17.4
y=11.4+17.4
y=28.8

and that's the answer, i didn't know the numbers below was options :P

Answer 3

thank you very much

Answer 4

:D

Answer 5

So it's 29 words/min

Answer 6

thank you ;D

Answer 7

no prob ;D