Can any one help out pls

Can someone me with this problem i don't understand i need

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?

The point a is at –2 and the point b is at 7. marissa would like to divide this line segment in a 4: 3 ratio, and she would like to use the formula x = (x2 – x1) + x1. what values should she substitute into the formula? a = a + b = x1 = x2 =