(B) Types of graphs of functions.
(a) Linear function: y = mx + c
Highest power of the variable x is 1.
(i) y = mx + c, m > 0
(ii) y = mx + c, m < 0
(b) Quadratic function: y = ax2 + bx + c
Highest power of the variable x is 2.
(i) y= ax2 + bx + c, a > 0
(ii) y= ax2 + bx + c, a < 0
(c) Cubic function: y = ax3 + bx + c
Highest power of the variable x is 3.
(i) y = ax3 + bx + c, a> 0
(ii) y = ax3 + bx + c, a< 0
(d) Reciprocal function:
Highest power of the variable x is –1.
