8. \( g(x)=\left\{\begin{array}{c}3, x \leq 2 \\ \frac{x}{2}+3, x>2\end{array}\right. \)
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The function \( g(x) \) is defined as a piecewise function, which means it has different expressions based on the value of \( x \). For values of \( x \) that are less than or equal to 2, \( g(x) \) outputs a constant value of 3. However, for values greater than 2, \( g(x) \) transforms into a linear function, gradually increasing as it takes on larger values of \( x \). This kind of function can model situations where a certain condition holds true only within a certain range. When graphing this function, you'll see a horizontal line at \( y = 3 \) up until \( x = 2 \), where the function jumps to the linear equation \( y = \frac{x}{2} + 3 \). It’s crucial to remember that when graphing piecewise functions, attention must be paid to whether the endpoints are included (closed dots) or not (open dots). A common mistake is to forget that at \( x = 2 \), the function is still defined as 3 rather than transitioning to the linear part.