Question

Observe the given graph, the number of bicycles sold in 7 minutes is .

• A. 18
• B. 21
• C. 24

Answer 1

The correct option is B 21


From the graph, the equation of line the points marked are (1,3) and (2,6)

$\text{Slope(m) =}\frac{6-3}{2-1}=3$

Here, the line passes through origin.

So, the equation of line is:
$y=mx$
$\Rightarrow y=3x$

Number of bicycles sold in 7 minutes is:
$y=3x$
$=3\times 7=21$