## Calculus (3rd Edition)

Because the number preceding x in the formula is 3, we know that the slope of the line is 3. To find the y-intercept, we set x = 0. $y = 3(0) + 12$ $y=12$ To find the x-intercept, we set y = 0. $(0) = 3x + 12$ Then subtract 12 from both sides. $-12 = 3x$ And divide by 3. $-4 = x$