Question Discussion & Solution

Hence, “8” will come in the place of question mark. 

The correct answer is Scatter plots.

Key Points

• Scatter plots
  • A correlation exists between two variables when one of them is related to the other in some way.
  • A scatterplot is the best place to start.
  • A scatterplot (or scatter diagram) is a graph of the paired (x, y) sample data with a horizontal x-axis and a vertical y-axis.
  • Each individual (x, y) pair is plotted as a single point.
  • Scatter plots are often used to find out if there's a relationship between variable X and Y. Hence, Option 2 is correct.
  • A scatterplot can identify several different types of relationships between two variables.
  • A relationship has no correlation when the points on a scatterplot do not show any pattern.
  • A relationship is non-linear when the points on a scatterplot follow a pattern but not a straight line.
  • A relationship is linear when the points on a scatterplot follow a somewhat straight line pattern. This is the relationship that we will examine.
• 

Additional Information

After observing the figure and its pattern carefully, we see option 4 completes the pattern of the incomplete figure.

Hence, option '4' will complete the pattern in the question figure.

The correct answer is Resolution.

• The number of horizontal and vertical pixels on a display screen is called Resolution.

​Key Points

• Resolution
  • ​ The number of horizontal and vertical pixels on a display screen is called Resolution.
  • The more pixels, the more information is visible without scrolling.
  • Screen resolutions have a pixel count such as 1600x1200, which means 1,600 horizontal pixels and 1,200 vertical pixels.
  • Screen resolutions also have base names, such as HDTV and Ultra UHD for TVs and XGA and WQXGA for computer monitors.  

Additional Information

• Dot Pitch 
  • ​Dot pitch is a measurement that defines the sharpness of a display.
  • It measures the distance between the dots used to display the image on the screen.
  • This distance is very small and is typically measured in fractions of millimetres.
• Aspect Ratio
  • ​Aspect ratio describes the ratio between the width and height of an image or screen.
  • The first number refers to the width, and the second number refers to the height.
  • A 1:1 aspect ratio, for example, is a square.

16 = 4²

100 = 10²

196 = 14²

216 = 6³

16, 100 and 196 are the perfect squares whereas 216 is a perfect cube.