S K Gupta and Anubhuti Gangal Solutions for Chapter: Graphs, Exercise 2: Exercise 18(B)

Draw the graph of the function $y=5x$.

Draw the graph of the function $y=5x$. Read from the graph, the value of $y$, when $x=5$.

Draw a graph to convert miles to kilometres, given $1$ mile $=1.6 \mathrm{km}$. Use the graph to find the number of kilometres that are approximately equal to $4.5$ miles?

Draw a graph to convert miles to kilometres, given $1$mile $=1.6 \mathrm{km}$. Use the graph to find the number of miles that are approximately equal to $8 \mathrm{km}$?

The following diagram shows the temperatures during a day. 

Plot the points on a graph and then join the points with straight lines.
 

The following diagram shows the temperatures during a day. 

Plot the points on a graph and then join the points with straight lines.

Approximately when did the temperature first reach $30°\mathrm{C}$ ? Was the temperature increasing or decreasing at this time?
 

The following diagram shows the temperatures during a day. 

Plot the points on a graph and then join the points with straight lines. For how long was the temperature above $40°\mathrm{C}$ ?

The following diagram shows the temperatures during a day. 

Plot the points on a graph and then join the points with straight lines. By how much did the temperature fall between $4$p.m. and $6$ p.m.?