Final answer:
To graph the equation x+y=4, rewrite it in slope-intercept form and choose values for x to calculate corresponding values of y. Plot the points on a graph and connect them to get the graph of the equation.
Step-by-step explanation:
To graph the equation x+y=4, we can rewrite it in slope-intercept form y = mx + b, where m is the slope and b is the y-intercept. By rearranging the equation, we get y = -x + 4. Now we can choose values for x and calculate the corresponding values of y. For example, if we let x = 0, then y = 4. If we let x = 1, then y = 3. Plotting these points on a graph and connecting them with a straight line will give us the graph of the equation.