What does the initial value mean for this function? roberta saves $10 each week. after 4 weeks, roberta has $90. roberta had $50 before she started to save money each week. roberta had no money until she started to save $10 a week.

She saves 10 per weekafter 4 weeks, she had 90

so if she started with nothing, after 4 weeks she would have 40but for her to have 90, she would have had to have started with (90 - 40) = 50.

Think about itshe starts with 50and then saves 10 for 4 weeks giving her 40and now she has 40 + 50 = 90

so ur answer is : Roberta had $ 50 before she started to save money each week