Question

The following graph shows the relation between the number of tires and their costs. The constant of proportionality for the given data is

• A. 100
• B. 200
• C. 400

Answer 1

The correct option is B 200

Constant of proportionality = $\frac{y}{x}$

Consider the point (2, 400) on the line.

Constant of proportionality= $\frac{400}{2}$

Now, $400÷2=$
$$\begin{array}{c}200\\ 2400\\ -\underset{–}{400}0\\ 00000\end{array}$$

Hence, the constant of proportionality is 200