Question 1148046

A line passes through (a,2) and (3,-5). If this line is parallel to the line containing the points (3,6) and (4,b) and perpendicular to the line containing the points (a,0) and (-5,b), what are the integer values of a and b?
<pre>{{{highlight_green(matrix(2,3, a, "=", 2, b, "=", - 1))}}}