Answer:
y = − 4.98
Explanation:
This statement means y ∝ x , which can also be written in the form y = k x when it is directly proportionate and y = k x when inversely proportionate, where k is a value we need to work out.
Since the equation is in the form y = k x we know that... 21 = K × 7
∴ k = 21 /7 = 3 .
So we can write this as the formula: y = 3 x
Therefore using the value of x = − 1.66
y = 3 x → y = 3 × − 1.66 = − 4.98
