exam Maths Puzzle Numerical Ability

what is the slope-intercept form of the line that contains the following points: (1, -3) and (3, -5).

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exam Other Question

i have to find an equation of a line that goes through the point (2,1) and has a slope of 4.
i have to leave it in slope intercept form. i have no idea how to do this problem. i get up to a certain point and then can't figure it out. Problem: (x^2-3x+2)/(x-1)