（b）On the grid，draw the graph of $$\(y=\frac{20}{x}\)$$ for $$\(1 \leqslant x \leqslant 5\)$$ ． ［3］

C3.5 Determine the equation of a straight line parallel to a given line. (e.g. find the equation of a line parallel to y=4x-1 that passes through (0,–3).