Calculus
When 0 < x ≤ 3, y = 15x + 5 and when x > 3, y = 12x + 11
When 0 < x ≤ 3, y = 12x + 5 and when x > 3, y = 12x + 11
When 0 < x ≤ 3, y = 10x + 5 and when x > 3, y = 10x + 11
When 0 < x ≤ 3, y = 12x + 5 and when x > 3, y = 10x + 11