slope =
to calculate the slope m use the gradient formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (8, 8 ) and (x₂, y₂ ) = (- 4, 5 ) ← 2 poinys on the line
m = = =
Answer:
2. 9x+4y=16
-9x -9x
4y=-9x+16
---- ---- ----
4 4 4
y= -9x
--- +4
4
4. 4x+3y=-9
-4x =4x
3y=-4x-9
--- --- ---
3 3 3
y= -4x
---- - 3
3
6. 7x-3y=6
-7x -7x
-3y=-7x+6
--- ---- ---
-3 -3 -3
y= 7x
--- -2