The range is the output or the y values in the case of this function. The only y value on this function is 1 therefore the range is 1
Simple...
change them all into fractions or decimals...
0.7---> 0.7

-->>0.77

--->>0.875
Ordering from greatest to least....
0.875-->>0.77-->>0.7

-->>

-->>0.7
Thud, your answer.
The interest rate would be 5%
You can find one the picture I send