79 What quadrants does the parent exp.decay functions pass thru?

## Step 1<br />The parent exponential decay function is given by \(f(x) = a(1 - r)^x\), where \(a > 0\) and \(0 < r < 1\). This function represents a situation where the quantity decreases over time.<br /><br />## Step 2<br />The function \(f(x)\) is defined for all real numbers \(x\), which means it passes through all four quadrants of the Cartesian coordinate system.<br /><br />## Step 3<br />However, the function \(f(x)\) is always positive because \(a > 0\) and \(0 < r < 1\). This means that the function does not pass through the third and fourth quadrants, where the y-values are negative.