(i) y = 4
Comparing this equation with y = mx + c, we have:
Slope = m = 0
y-intercept = c = 4
(ii) ax − by = 0
⟹ by = ax ⟹ y = (a/b)x
Comparing this equation with y = mx + c, we have:
Slope = m = a/b
y-intercept = c = 0
(iii) 3x − 4y = 5 ⟹ 4y = 3x – 5 ⟹ y = (3/4)x - 5/4
Comparing this equation with y = mx + c, we have:
Slope = m = 3/4
y-intercept = c = -5/4