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First thing since the x axis is in units of days make the domain 21 days.
Yes your answer to b is correct.
Are you looking at question #3?
oh sorry i was looking at question 1 1(c) is incorrect though the number in parentheses after B refers to the number of days so correct is B(12) = 0
oh thanks so much for telling me
that it was incorrect
Were they less than $100 on a for number 3
OK Question 3 (a) On 16th day she had zero in her account and added $100 Note the slope of that graph for the period of 1 day. After that the graph still had a positive straight slope but it was not so steep . This shows that she added a constant amount each day but was it more than $100 or lot?
If it was $100 each day then the graph would keep the same slope.
ok so if shes adding $100 everyday, then yes it would be more than $100. Right? because shes keeping the same slope of a $100 ?
wait but keeping the same slope wouldn't change right, so it would be less than a $100
No after the 16th day she is not keeping the same slope |dw:1450018154639:dw|
the slope becomes less (slope of course is the Y / X
Did you see my last comment
Oh now i see its Yes you are right The amount added each day must be lass than $100
part (b) what is your eatimate of the amount in the bank at day 21?
its about 3/4 of the way up the vertical axis agreed?
no the greatest balance was given as $400 so a good estimate would be 3/4 * 400
300 or 8400
300 dollars why do you say 8400?
because the greatest balance she had was $400
well i looked on your graph and saw 400 and 21 and i just multiply. As i thought it was going across
I see No what we are looking at each day is the balance which cooresponds the a point ion the vertical axis
Point P corresponds to day 21 and the balance on that day wa s $300
ok thank you
For the last part we start with 100 on day 16 and have 300 on day 21 so over 5 days theere is a an increase in $200 so amount added each day = 200/5 - and this corresponds to the slope in the graph
excuse my poor drawings!
I see it perfectly, you're fine
Thanks again, You've been a great help.