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 use dfield7 to plot direction fields and solution curves for different equations. They are then given 5 problems to solve using dfield7, estimating solutions to initial value problems for various differential equations by placing points on the graphs or using keyboard input. The document concludes by noting dfield7 can quickly solve first order DEs and hints that future labs will cover higher order and systems of DEs.