In this question, we are missing the data that is necessary to fully answer it. However, we can still talk about the relationship that you will be studying in order to help you analyze the results that you will obtain.
It is true that older people tend to make more money than younger people. According to PayScale, wages increase 30% for men and 34% for females between the ages of 22 and 30. Moreover, full time workers with bachelor degrees do not reach their peak in income until their 40s (women) or 50s (men).