$1300 invested at 4.2% over 5 years and 9 months

Well, to find that, you would do:

x(1 (+ or -) % interest rate) * Time.

So I believe that would turn to this:

1300(1+0.042)(5.75)

Your 'x' being 1300, your interest growing by 4.2% and the time of 5 years 9 months (5.75)

Abit confused about what you mean, but i think you might be referring to slope intercept form: y = mx + bin that case b, or the y intercept is already given.(0,-1)find the slope by using the formulay2 - y1/x2 - x1the final slope will be 4/2, equivalent to 2.now your equation should look like thisy = 4/2x -1sorry if this didn’t you out!

For being nice i appreciate it but abc