Identify the linear equation.

a) y = lxl + 5

b) y = 1/2 ( fraction )x + 3

c) y = x2 (exponent) - 4

d) y = 3/4 (fraction ) x2 ( exponent )

There are two linear equations from the choices given which is A and B. Graphing the each equation gives a straight line which describes a linear equation. A linear equation only involves two variables which is the dependent and the independent variables. The functions in choices C and D are quadratic equations since when each is plotted they give a parabola.