Answer:
A linear graph
Step-by-step explanation:
Simple interest is modeled using the formula
I = prt
where I is the amount of interest, p is the amount of principal, r is the interest rate and t is the amount of time.
Time is usually the variable in these situations; this would give us an equation of the form
y = pr(x), where p and r are numbers.
This is similar to y=mx, which is a linear function.
