When y=4, x=8/5
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x - y = 4x - y + 4 = 0x + 4 = yThe graph is a straight line, with a slope of 1, passing through the point y=4 on the y-axis.
y=-10x-4
The graph of the function f(x) = 4, is the horizontal line to the x=axis, which passes through (0, 4). The domain of f is all real numbers, and the range is 4.
X = 4 is a vertical line, 4 units to the right of the y-axis.
Every point on the line x=4 will have to have an x value of 4. When plotting a graph of x=4, you will find that it turns out to be a vertical line, parallel to the y axis. This is because you can choose whatever y coordinate you want, but as long as the x coordinate is 4, it will be on the line x=4. The x intercept will, therefore, be 4. There is no y intercept as it never crosses the y axis.