WRITING & USING FUNCTIONS FROM VERBAL DATA

Question

Question is below
Tina is saving $0.30 per week. 5 weeks ago she had $1.95. Write a function for Tina's savings week by week.
How do you go about doing this problem?
Thank You in advance

Answer 1

If you do the function from week from the present time... then it would be

f(x) = 3.45 + .3x

Answer 2

Where did you get the 3.45 Jessie? I am still slightly confused.
Thanks John