To graph y=0.4x, plot the y-intercept (0,0) and another point, such as (10, 4), by using the slope of 0.4, then connect these points with a straight line.
To graph the equation y=0.4x, you'll want to plot two points where the line defined by this equation will pass through.
Since this is a linear equation with a slope of 0.4, you can start by plotting the y-intercept, which is at the origin (0,0) because there is no constant term.
Next, choose a value for x—let's say 10.
The corresponding y-value would be 0.4(10) = 4. Plot the second point at (10, 4).
Now connect the two points with a straight line.
This line represents the graph of the equation y=0.4x, where 0.4 is the rate of change of y with respect to x.