I have a task where I have to find the equation of ....

A line that passes through (0,7) at a gradient of 3.

* I Think this one is 3x+7*

A line that passes through (2,3) at a gradient of 2.

A line that passes through (4,3) at a gradient of -1.

A line that passes through (2,1) and (4,5)

A line that passes through (4,5) and (6,7)

A line that passes through (0,5) and (3,2).