Question

I need to know the correct formula for the function

Answer 1

The points of the line can be found from the diagram, they are as follows.

(1,0) and (0,-2)

The equation of line joining two points is

`y-y_1=m(x-x_(1))`

Where m is the slope here.

The slope of the line is

`m=(-2)/(-1)=2`

Hence the equation is

`y=2(x-1)`

And the answer is y=2x-2.