Calculus with Applications (10th Edition)

The equation is in the slope-intercept form, $y=mx+b$ $y=4x+3$ The y-intercept is b=3, the line passes through (0,3). One more point needed (two points determine a line). When x=1, y=4(1)+3=7 So, another point on the line is (1,7). Plot the two points and draw a straight line through them.