Final answer:
To mark x squared = 16 on a number line, first solve for x to get x = 4 and x = -4. Then, draw a number line with numbers from -5 to 5 and place a mark at 4 and -4.
Step-by-step explanation:
To visualize the solutions for the equation x squared = 16, we start by solving for x. Taking the square root of both sides gives us two solutions, x = 4 and x = -4, because both 4 and -4 squared equal 16.
Now, let's create a number line. Draw a horizontal line and put evenly spaced tick marks on it, representing numbers. Since we are dealing with 4 and -4, make sure your number line includes numbers from at least -5 to 5. Place a mark above the number line at both 4 and -4 to indicate the solutions to the equation x squared = 16.