# 2.1 Types of Graphs of Functions.

(B) Types of graphs of functions.

(a) Linear function: y = mx + c
Highest power of the variable x is 1.
(iy = 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.
(iy= 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: $y=\frac{a}{x}$
Highest power of the variable x is –1.