## Elementary Geometry for College Students (6th Edition)

To find the x and y intercepts, we plug in 0 for y and x, respectively: $3x +7(0) = 21 \\ x =7$ $3(0) + 7y = 21 \\ y =3$ The x-intercept is (7,0) and the y-intercept is (0,3). To draw the graph, plot each of these points, and then draw a lie that goes through both.