Okay its 1,6,7,12,14,19,22
1+5+1+5+2+5+3
27,31,36,41,46
The rate of change on the line is x line goes to the right and y line goes upward
y=2x+4
that is an equation in slope intercept form where the slope is 2 so you would go up two right 1 and the y intercept would be 4 so (0,4)
Assuming you are referring to simple interest not compound that that it is annual you would gain $100 putting you at $600