1 The line \(A B\) has equation \(7 x + 3 y = 13\).
- Find the gradient of \(A B\).
- The point \(C\) has coordinates \(( - 1,3 )\).
- Find an equation of the line which passes through the point \(C\) and which is parallel to \(A B\).
- The point \(\left( 1 \frac { 1 } { 2 } , - 1 \right)\) is the mid-point of \(A C\). Find the coordinates of the point \(A\).
- The line \(A B\) intersects the line with equation \(3 x + 2 y = 12\) at the point \(B\). Find the coordinates of \(B\).