Subject Experts Solutions for Chapter: Introduction to Graphs, Exercise 4: SUMMATIVE ASSESSMENT

The line graph given below shows the side of a square and its perimeter.

The perimeter is $12 \mathrm{cm}$, If the side of the square is $k \mathrm{cm}$, find $k$.

In the given graph, $\mathrm{A}$ starts walking at $5 \mathrm{am}$ at a speed of $6 \mathrm{km}/\mathrm{h}$. After $2 \mathrm{h}$, $\mathrm{B}$ starts from the same point by bicycle in the same direction at a speed of $10 \mathrm{km}/\mathrm{h}$, then by using the graph, if the distance covered by $\mathrm{A}$ and $\mathrm{B}$ when they meet is $x \mathrm{km}$, then find the value of $x$.

The line graph given below shows the sales of a shopkeeper in the first week of January, $2016$.

If the cost of one doll is $₹100$, then how many dolls were sold on $4\mathrm{th}$ January, $2016$ by the shopkeeper?

Using the graph below, answer the questions given below.

Which is the nearest point to origin?

A person moves $7$ units left (due West) from a point $\mathrm{C}\left(0, 0\right)$ and then moves $6$ units downwards(due south). If his new position is $\left(a,b\right)$, Find the value of $a+b$.

Observe the given circle graph (pie chart) and given that the monthly salary of the family is $₹10800$. If the difference in expenditures on clothes and education is $₹k$, then find the value of $k$.

A survey of endangered penguins was carried out on a small island.

Which year showed the lowest population of penguins?

A survey of endangered penguins was carried out on a small island.

What was the population decrease between $2008$ and $2009$?