Question

Question 77 (i)

From the following table determine if x and y are in direct proportion.

• A. x and y are in proportion.
• B. x and y are not in proportion.

Answer 1

The correct option is B

x and y are not in proportion.

To check if x and y are in proportion: $\frac{x}{y}=k\left(constant\right)$

$\Rightarrow \frac{x}{y}=\frac{3}{12},\frac{6}{24},\frac{15}{45},\frac{20}{60},\frac{30}{120}i.e.\frac{1}{4},\frac{1}{4},\frac{1}{3},\frac{1}{3},\frac{1}{4}$

Since the value of k is not the same in all cases, we can conclude that x and y are not in proportion.