Iwill rate you

an account earns simple interest

2,000 at 3.5 for 4 years

a. find the interest earned

b. find the balance of the account

I=PRT
Interest=Principal times Rate times Time
Principal=amount invested in itially
Rate=rate in decimal form
time=time in years

so

given
principal=2000
rate is 3.5%=0.035
time=4yrs

so
I=(2000)(0.035)(4)
I=(8000)(0.035)
I=280

A. the interest earned was $280

B. add interest to the principal
280+2000=2280
the ballance was $280 after 4 yrs

Just divide the x axis (the top) by 2 or multiply the y axis (the bottom) by 2