Just a quick summary of the box and whisker plot and a question with the min, lq, median, uq and max given and a scaled grid to draw the chart.

Meant as a quick 10 minute revision task and a summary for revision by the students nearer the Module 1 exam.

Another one side 10 minute question to check recall of the vocabulary, spotting the outliers and drawing line of best fit. Data set about age and blood pressure after exercise. One data point has been fiddled so it is clearly an outlier. Asks for how removing this point would change the correlation. Line of best fit and a prediction question.

One side A4 with a frequency table, a spare column for the cumulative frequencies and a grid with scales to plot the curve on. Questions ask for median, quartiles and iqr. Also a question about what percentage more than a certain value of the variable.

Meant for a quick 10 minute revision exercise for Module 1 exam soon, and so the students have (another) one side summary of cumulative frequency.

Just for revision for the module 1 exams soon. A frequency diagram question with grid and data set all on one side of A4.

I quickly sketch the answers on the interactive whiteboard using 'overlay', then we make some revision notes based on what each student finds they need to remember.

Three sides introducing (x,y) notation and the patterns associated with a straight line graph. Some work on coordinate geometry (i.e. find the coordinate to complete the rectangle/isosceles triangle/kite). Plotting from formulas for simple cases. Idea that the constant in the y=3x +1 type formula controls how far up the Y axis the line is...

Graph grids with points and labels produced using pyxplot 8.01, and nice they look as well. Page about using this software coming soon.

# uses pyxplot to make a 5 by 5 square positive quadrant on a 6 by 6 graph grid
# with lines each 0.1 and axis labels each unit
# axes lines have arrows at end
set terminal eps
set output '5positive.eps'
set size square
f(x) = 0
set xtics 0, 1
set ytics 0, 1
# grid draws the lines, and mxtics/mytics says how the lines spaced
# and where they start
set grid
set mxtics -1, 0.1
set mytics -1, 0.1
# make the axes arrows, and start at the zeros instead of the edge
# of the boxes
set axis x arrow
set axis y arrow
set axis x atzero
set axis y atzero
# basic labels, can't control linear position
set xlabel 'X'
set ylabel 'Y' rotate 90
set nokey
# the plot command also controls the size of the box
plot [-1:5][-1:5] f(x)

This all needs to be packaged as a function with variables controlling the shape, range and amount of 'spare' space around the axes. It will save a LOT of time writing activity sheets and class notes about graphs

Lovely - just what I need but 1/0 being 'quietly ignored' worries me. Shading the area corresponding to an inequality in gnuplot. Just work out how to use line shading instead of solid colour for the notes.

graphical inequalities