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The equation of a line represents the relationship between two variables. If we know one of the variables (x or y) then we can find the other variable.

a) A point on the x-axis means that y=0. Put y=0 in the equation and solve for x. x=4/3

b) A point on the y-axis mean that x=0. Put x=0 in the equation and y=-4.

You can now use these points to draw line on a cartesian plane. Take a look at the attached photo.
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