key characteristics of fixed costs,”- total fixed costs stay constant over a wide range of volume-total fixed costs per unit of activity vary inversely with changes in volume:–fixed cost per unit of activity increases when volume decreases–fixed cost per unit of activity decreases when volume increases-total fixed cost graphs are always flat lines with no slop that intersect the y-axis at a level equal to total fixed costs-total fixed costs can be expressed as y=fwhere
y=total fixed costf=fixed cost over a given period of time”