The slope of the tangent to a curve at any point (x, y) on the curve is -x/y. find the equation of the curve if the point (2,-2) is on the curve a. x+y=0
b. x^2-y^2=-2
c. x^2+y^2=16
d. x^2+y^2=8

The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.  bar charts, on the other hand, can be used for a great deal of other types ofvariables  including  ordinal  andnominal  data sets.