1. The problem statement, all variables and given/known data I'm trying to solve #1 here: http://www.student.math.uwaterloo.ca/~math115/Exams/M115.FE.pdf [Broken] The problem is: 3. The attempt at a solution (a) At a=2, the slope is the same. I figure any value but 2 gives unique solutions. But I don't know if this is right. (b) At a=2, the slopes are the same, but lines are different. I cannot find any value of a that would give the same slope and same outputs for inputs of x. DNE is the answer? (c) At a=2, there are no solutions for the system because the lines are parallel to each other. a=2 is the answer. (d) I think this part was done correctly. I used substitution and solved for the x and y values at a=1 and resulted with (2/3, 1/3) I would like to know about a, b, and c. I don't know if I did these right. Thanks.