Joined is an option for ListPlot and related functions that specifies whether points in each dataset should be joined into a line, or should be plotted as separate points.

FrameTicks is an option for 2D graphics functions that specifies tick marks for the edges of a frame.

LinearSolve[m, b] finds an x which solves the matrix equation m.x == b. LinearSolve[m] generates a LinearSolveFunction[...] which can be applied repeatedly to different b.

Show[graphics, options] shows graphics with the specified options added. Show[g_1, g_2, ...] shows several graphics combined.

GridLines is an option for two-dimensional graphics functions that specifies grid lines.

expr[[i]] or Part[expr, i] gives the i\[Null]^th part of expr. expr[[-i]] counts from the end. expr[[i, j, ...]] or Part[expr, i, j, ...] is equivalent to expr[[i]][[j]] .... ...

ScalingFunctions is an option for BarChart, Histogram, and other charting functions that specifies what scaling functions should be used.

LabelStyle is an option for formatting and related constructs that specifies the style to use in displaying their label-like elements.

Suppose that you have a limited amount of data from which to obtain estimates of statistics for a population. The sampling distribution for those estimates can be ...

ContourPlot in the built-in Mathematica kernel now accepts equations.