Question

Alfred is practicing typing. The first time he tested himself, he could type 45 words per minute. After practicing for a week, he could type 48 words per minute. After two weeks he could type 51 words per minute. Based on this pattern, predict how fast Alfred will be able to type after 4 weeks of practice.

A.
61 words per minute
 
B.
57 words per minute
 
C.
54 words per minute
 
D.
51 words per minute

Answer 1

the first time he could type 45 words per minute
after 1 week, he could type 48 words....so he added 3 words
after 2 weeks, he could type 51 words...so he added 3 words
so the pattern is adding 3 words per week...
wk 0 = 45
wk 1 = 45 + 3 = 48
wk 2 = 48 + 3 = 51
wk 3 = 51 + 3 = 54
wk 4 = 54 + 3 = 57 <=== so in 4 weeks, he looking at 57 words per minute