With Claudia's loan does loan length or interest rate have a greater effect on the cost of the interest for the loan explain

The longer length of the loan would increase the amount of the interest paid.

Example a $2000 loan at 3% for 6 months would add $360 (2000x. 03 = $60 a month. $60 x 6 = $360 Total interest for 6 months.

The same loan for 12 months would cost

$60 x12 = $720.

So for 6 months total you would pay on an $2000 loan would be $2360, and for 12 months would be $2720.