18. Which is a zero of the function \( f(x)=2 x-6 \) ? A. -6 B. -3 C. 2 D. 3

To find the zero of the function \( f(x) = 2x - 6 \), we set the equation equal to zero: \( 2x - 6 = 0 \). Solving for \( x \), we add 6 to both sides to get \( 2x = 6 \), then divide by 2, giving us \( x = 3 \). Therefore, the zero of the function is \( D. 3 \). Finding the zero of a linear function like this one is as simple as looking for the x-intercept on the graph. It’s the point where the line crosses the x-axis. For \( f(x) = 2x - 6 \), it intersects at \( (3, 0) \), so if you ever need to graph this function, just plot the point and draw the line!