Image In this graph, the gradient = (change in y-coordinate)/(change in x-coordinate) = (8-6)/(10-6) = 2/4 = 1/2 We can, of course, use this to find the equation of the line. Since the line crosses the y-axis when y = 3, the equation of this graph is y = ½x +...
Free plotting graphs GCSE maths revision guide, including step by step examples, exam questions and free worksheet.
The lower quartile is (n+1)/4 th value (n is the cumulative frequency, i.e. 157 in this case) and the upper quartile is the 3(n+1)/4 the value. The difference between these two is the interquartile range (IQR). In the above example, the upper quartile is the 118.5th value an...
Plotting quadratic graphs GCSE questions Learning checklist Next lessons Still stuck? GCSE Tutoring Programme Our chosen students improved 1.19 of a grade on average - 0.45 more than those who didn't have the tutoring. Teacher-trusted tutoring In order to access this I need to be confiden...
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