Increasing is= [0,90], [270,360]
Decreasing is=[90,270]
Concave up=[180,360]
Concave down=[0,180]
All real numbers are greater than 0
A budget is a periodical compilation of the estimated revenue earned and expenses incurred within a given time period
Monthly income calculation
James monthly income is calculated as follows;
Monthly income =
The required <u>James' monthly personal budget </u>is presented as follows;
Based on the above monthly income, the monthly personal budget is found by entering the given values in a budget template as follows;

Savings
$944.
Learn more about how to make a budget here:
brainly.com/question/14080312