This lab document introduces the dfield7 tool in Matlab for investigating and visualizing solutions to first order differential equations. Students are instructed on how to access dfield7 within Matlab and are given examples of its basic functions like plotting solution curves from initial conditions. The document then lists 5 practice problems for students to solve using dfield7, obtaining approximate solutions to initial value problems for different first order differential equations by placing the cursor or entering values at specific points on the direction field graphs.