Marcie went to the emergency room for the second time in a month complaining of difficult breathing and chest pain that had come
on suddenly. She thought she was having a heart attack and was afraid she was dying, but the doctor could not find anything wrong. She may be suffering from ________.
To represent a function in a graph, the values of the independent variable (x) are represented on the horizontal or abscissa axis, and the values of the dependent variable (y) are represented on the vertical or ordinate axis.
