What is the y-intercept of the line that passes through the points (3,7) and (-2,-3)?
a.) (1,0)
b.) (0,4)
c.) (0,1)
d.) (0,-4)

There's probably and easier way to do this, but if you set up an equation in point slope form and input 0 for x that should work. The slope is (-3-7)/(-2-3)= 2, so an equation would be y=2(x-3)+7. y=2(0-3)+7  =  y=-6+7= 1, and of course the x coordinate is 0, so (0, 1) is the y int. 

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.