Question

How do you write an equation for a line given `m=-7` and `f(2)=-1`?

Answer 1

`y=-7x+13`

Explanation:

`f(2)=-1` is basically the coordinate `(2,-1)`. The gradient `(m)` is given, so

`y=-7x +c`

Substituting `(2,-1)`

`-1=-14+c`

`c=13`

Therefore

`y=-7x+13`