bilateral symmetry the configuration of an irregularly shaped body (such as the human body or that of higher animals) that can be divided by a longitudinal plane into halves that are mirror images of each other. radial symmetry that in which the body parts are arranged regularly around a central axis.he configuration of an irregularly shaped body (such as the body of a higher animal) that can be divided by a longitudinal plane into halves that are mirror images of each other. radial symmetry. that in which the body parts are arranged regularly around a central axis.
Linear Functions. If the power of both x and y in a relation is one, then the relation is called a linear relation or linear function. For example, y = 3x + 5, 7x  8y = 56 and 2x + 3y + 6 = 0 are linear functions because the power of both x and y is one. Plotting Graphs of Linear Functions.
Since a linear function is a straight line, it has a maximum of one root (zeâ¦ro).   The zero of a function can be determined by the highest degree (power) of the function. Since linear functions are only raised to the power of one, one is the total number of times the line can touch the x-axis.