The graph of the given functions is (see in attachments).
Line Graph :
Graphs are visual displays of the data that have been gathered. Its goal is to visualize numerical data in a tangible way so that it may be quickly, simply, and clearly understood. A line graph is a special type of graph that is frequently employed in statistics. It shows how one quantity has changed in relation to another. For instance, we may use this graph to illustrate how the cost of various chocolate flavors fluctuates. Typically, a two-dimensional XY plane is used to plot this variation. A graph is said to be linear if it can represent the relationship between any two measurements by a straight line. Consequently, a line graph is often known as a linear graph.
Well if the straight line is equal to 1 then your answer is 2/3 but if the straight line is not equal to 1 you need to know what it is equal to or you could use the equation y = (2/3)x "x" would be the length of the straight line and "y" would be two-thirds of it