



 
Hi Jenny, The equation of a line in "pointslope form" is given by y  y_{1} = m (x  x_{1}) where m is the slope of the line and (x_{1}, y_{1}) is a point that the line passes through. Using the first of your questions: slope = 4, passing through (1, 3) To convert this equation into slopeintercept form (y = mx + b) simply requires that we expand the right hand side to eliminate the brackets, and then isolate y on the left: Hope this helps you with the balance of your problems.  


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