Answer:
[tex]gradient = \frac{change \: in \: y}{change \: in \: x} \\ = \frac{y2 - y1}{x2 - x1} \\ = \frac{4 - - 2}{0 - - 2} \\ = \frac{6}{2} \\ = \frac{3}{1} \\ let \: (xy) \: also \: lie \: on \: the \: line \\ gradient \: = \frac{y2 - y1}{x2 -x1} \\ \frac{3}{1} = \frac{x - - 2}{y - - 2} \\ \frac{3}{1} = \frac{x + 2}{y + 2} \\ 3(y + 2) = 1(x + 2) \\ 3y + 6 = x + 2 \\ 3y + 6 - 2 = x \\ 3y + 4 = x[/tex]
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