Ajay Kumar Solutions for Chapter: Data Interpretation and Analysis, Exercise 1: Practice set

Vinita has $6$ marks on her report card.

The mean of the $6$ marks is $74$.

The mode of the $6$ marks is $76$.

The median of the $6$ marks is $76$.

The lowest mark is $50$.

The highest mark is $94$.

Only one mark appears twice and no mark appears more than twice.

Assuming all of her marks as integers, the number of possibilities for her second-lowest mark is:

A student creates a table to show the relationship between the side length of a square and its area.

Which of the graphs below best represents this relationship?

Consider the data set $14, 18, 14, 14, 10, 29, 33, 31, 25.$ If you add $20$ to each of the values, then:

The graph depicts the link between mass and price of four different strawberry jam brands:

Which statement is true?

In an investigation, a student holds a motion detector, points it at a wall and walks towards the wall.

The student walks slowly at first and then speeds up as he approaches the wall. Which of the following graphs would be produced on the graphing calculator?

Rajnish is creating his own summer gardening job.

For each garden, he will charge an Rs.$10$ initial consultation fee plus Rs. $8$ per hour. Which graph best represents Rajnish's earnings for each garden?

A rectangle is to have a perimeter of $120$m. The graph below shows the relationship between the area of the rectangle and its width. What is the width of the rectangle with the largest area?

The current plan for downloading music is made up of a flat fee of $\mathrm{Rs}.20$ and a fee of $\mathrm{Rs}.0.50$ per download. a new plan is made up of flat fee of $\mathrm{Rs}.10$ and a fee of $\mathrm{Rs}.0.50$ per download. which graph represents both plans?