Rigid copper is often used for water supply lines within the home. They can be straight or could zig-zag or curve. Vertical lines - lines that move up and down without any slant. when x = 0:    y = \((0)^{3} – 6(0)^{2} + 0 + 3 = 3\), when x = 4: y = \((4)^{3} – 6(4)^{2} + 4 + 3= -25 \), So the two points are (0, 3) and (4, −25). It is continuous and we can increase the length, straight or curved. Line types and their application There are technical drawings of different lines, whose application for underwriting certain elements is foreseen. Line is probalby the most fundamental of all the elements of design. Line search in art works. [CDATA[ A horizontal line is a line drawn from left to right in a straight direction. We do this from the equation of the curve: \(y = x^{3} – 6x^{2} + x + 3 \). Horizontal Lines go side to side. (adsbygoogle = window.adsbygoogle || []).push({}); //