x - 4y = 4
x-intercept for y = 0
substitute y = 0:
x - 4(0) = 4
x - 0 = 4
x = 4 → (4, 0)
y-intercept for x = 0
substitute x = 0:
0 - 4y = 4
-4y = 4 divide both sides by (-4)
y = -1 → (0, -1)
