Answer:
The equation is
[tex]y = - 2x + 6[/tex]
Step-by-step explanation:
First we find the measure
[tex]m = \frac{4 - 2}{1 - 2} = - 2[/tex]
Then the equation is
[tex]y = - 2x + c[/tex]
To find C we can usw any point
Then
[tex]2 = - 2 \times 2 + c \\ c = 6[/tex]
Then the equation is
[tex]y = - 2x + 6[/tex]
