Calculate the gradient of the line joining the following points:A(1, 1), B(3, 9)
\[m = \frac{{10}}{4}\]
\[m = 4\]
\[m = \frac{1}{4}\]
Calculate the gradient of the line joining the following points:P(-4, -1), Q(2, 3)
\[m = \frac{2}{3}\]
\[m = \frac{3}{2}\]
\[m = - \frac{2}{3}\]
Calculate the gradient of the line joining the following points:S(-2, 5), T(1, - 4)
\[m = - 3\]
\[m = 3\]
\[m = - \frac{1}{3}\]
Find the equation of the following line:
\[y = 3x + 1\]
\[y = 2x + 3\]
\[y = x + 3\]
\[y = \frac{1}{3}x - 3\]
\[y = \frac{1}{3}x + 3\]
\[y = 3x - 3\]
\[y = - \frac{1}{4}x - 1\]
\[y = - 4x + 1\]
\[y = 4x + 1\]