Why would someone choose to use a graphing calculator to solve a system of linear equations instead of graphing by hand? explain your reasoning. sample response: a graphing calculator is more accurate than graphing by hand. if the slope and/or y-intercept is a fraction or decimal, it is more difficult to accurately graph by hand. using a calculator might also be more time efficient because it might accept a line in any form. a calculator’s window can be adjusted quickly instead of having to redraw a graph by hand when adjusting the scale.