Find the volume for this problem ?

Matt and brian were solving a system of equations. they both noticed that the two lines had the same slope. brian said that because each line in the system had the same slope, the two lines had to be parallel, which meant the solution to the system was "no solution" matt disagreed, and said they should also look at the y-intercepts before determining how many solutions there were. who is correct?

He concluded that a heavier object dropped from the same height as a lighter object will land

Alogical argument that is presented in graphical form using boxes and arrows is called?