Answer:
first option
Explanation:
the equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
calculate m using the slope formula
m = 

with (x₁, y₁ ) = (0, 8 ) and (x₂, y₂ ) = (6, 4 )
m = 
 =
 = 
 = -
 = - 

the line crosses the y- axis at (0, 8 ) ⇒ c = 8 , then
y = - 
 x + 8 ← option 1
 x + 8 ← option 1