ABSTRACT
Plot a graph of y (vertically) against x (horizontally) to scales of 1cm = 1 for the horizontal x-axis and 1cm = 2 for the vertical y-axis. From the graph, find (a) the value of y when x = 3 (b) the value of y when x = −4 (c) the value of x when y = 1 (d) the value of x when y = −20 (8)
4. If graphs of y against x were to be plotted for each of the following, state (i) the gradient, and (ii) the y-axis intercept. (a) y = −5x + 3 (b) y = 7x (c) 2y + 4 = 5x (d) 5x + 2y = 6 (e) 2x − y
3 = 7
6 (10)
5. The resistance R ohmsof a copperwinding ismeasured at various temperatures t◦C and the results are as follows.
