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point of origin
The domain consists of all values of x for which there is a point on the graph. Similarly, the range applies to all the y values.
Take a few (minimum of two, take 2 only after prior practice) values of x as desired and substitute in the equation to get the y values. Now take a graph and have a scale (usually 1m = 1 unit) and point the x and y values on the graph. Join these points to form a line. This is the required graph
The x values are on the horizontal axis and the y values are on the vertical axis.
slope means the difference in the y-values over the difference in the x-values. y-intercept means the point at which the graph goes through the y-axis.