Answer:
Steven starts with an account balance of $300
And with each passing month his balance increases by $150
Explanation:
300 is you're start value
On the graph you can see that Feb. 1 hits the line on the graph between $300 and $600. You want to find half of $300, So you divide 300 by 2, And that give you 150.
Then with you can add 150 to 300 to give you 450. Then add 150 to 450 to give you 600. And repeat the process.
Hope This Helps :)