Interpret basic exponential functions

**What is the common ratio $r$ of the exponential function $h(x)=-\dfrac{3}{80}\cdot\left(\dfrac{1}{2}\right)^x\ $**? $r=$ [[☃ numeric-input 1]] **What is the value of $h(x)$ when $x= -5\ $**? $h(-5)=$ [[☃ numeric-input 2]]