Question 1130236
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Lauren is planning to raise her batting average. When she set up her weekly practice schedule, 
her batting average was 250. Lauren intends to increase her batting average by 5 each week. 
Find a pattern and write a formula that will give her expected batting average after n weeks.

a1 =

d=

Using the formula, how many weeks will Lauren need to practice if she expects to earn a batting average of 300? 
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In his post, @mananth produced wrong answer   (21  weeks).



The correct answer to the posed question is    {{{(300-250)/5}}} = {{{50/5}}} = 10 weeks,


based on common sense and without blowing the theorizing bubble,   but not  21  weeks.



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@mananth, theorizing is good, but at the end you should   {{{highlight(highlight(CHECK))}}}   
if it withstands the critics of the common sense.


Without making check,  NOTHING  prevents you of making errors.