y = 4x + 2 It has a slope (gradient) or 4. The slope/gradient of a linear function is simply the number in front of the x when the equation is in the form y=mx+b. (the coefficient of x).
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If you mean: y = 4x-2 and y = x+13 then x = 5 and y = 18
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The function y = x is the graph that passes from the points (-1, -1), (0, 0), and (1, 1) The function y = 4x is the graph that passes form the points (-1, -4), (0, 0), and (1, 4) Sketch these graphs in a same x and y coordinate system, and you can see both of them
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If you mean: y = 4x-2 and y = -x+3 then when plotted on the Cartesian plane the lines will intersect at (1, 2) because x = 1 and y = 2
Without an equality sign the expression given can't be considered to be an equation.
If you mean y = 4x-6 then the slope is 4 and the y intercept is -6
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