Forming equations using proportion by Boxed Rockets

Form Equations to Represent the Following

Question 1:

y is inversely proportional to x, when x = 7, y = 14

y = \frac{98}{x}

Question 2:

y is inversely proportional to x, when x = 10, y = 2

y = \frac{20}{x}

Question 3:

y is directly proportional to x, when x = 3, y = 27

y = 9 x

Question 4:

y is inversely proportional to x, when x = 8, y = 9

y = \frac{72}{x}