Question 1154433
<br>
The common ratio is<br>
48/72 = 72/108 = 108/162 = 2/3<br>
Because the value 162 is for x=1, one form of the exponential function is<br>
{{{y = 162(2/3)^(x-1)}}}<br>
Since 162 is (2/3) of 243, another form of the expression is<br>
{{{y = 243(2/3)^x}}}<br>