Question 335634: Alfred is practicing typing. The first time he tested himself, he could type 23 words per minute. After practicing for a week, he could type 26 words per minute. After two weeks he could type 29 words per minute. Based on this pattern, predict how fast Alfred will be able to type after 4 weeks of practice
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Alfred is practicing typing. The first time he tested himself, he could type 23 words per minute. After practicing for a week, he could type 26 words per minute. After two weeks he could type 29 words per minute. Based on this pattern, predict how fast Alfred will be able to type after 4 weeks of practice
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You have 3 points: (0,23) ; (1,26) ; (2,29)
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Notice that y increases 3 for every x-increase of 1; that is the slope;
Notice that y = 23 when x = 0 ; that is the y-intercept.
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f(x) = 3x+23
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Therefore f(4) = 3*4 = 23 = 35
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Cheers,
Stan H.
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