The best graph that represents the equation x + 2y = 4 is a straight line. To find the graph, first rewrite the equation in slope-intercept form, which is y = mx + b. Solving the equation for y, we have y = (4 - x)/2. With this, we can determine that the slope (m) is -1/2 and the y-intercept (b) is 2. Thus, the graph is a straight line that has a slope of -1/2 and crosses the y-axis at the point (0, 2).
