Question

Write an equation that describes the function.

Answer 1

Find the slope, first:

`m = ( y_(1) - y_(2) )/( x_(1) - x_(2) )`
Use any two points, for example (1,0) and (3, -2)

`m = (-2 - 0)/(3 - 1) = -1`
So, the slope is -1.
Then, use the formula for any given point, y and x are constants

`y - y_(1) = m(x - x_(1) )`
Use, for example, point (1, 0)

`y - 0 = (-1)(x - 1)`

`y = -x +1`
So, the equation is
`y = -x +1`

Answer 2

from the points you get a slope of -1 using the slope in y=mx+b you get b=1 so y=-x+1