SOLUTION
The Picture below is a table showing the average high temperature for Dallas for two years.
From the graph
[tex]\begin{gathered} x_1=\text{ represents the months for 24 months} \\ y_1=\text{ represents the average high temperature for each month } \end{gathered}[/tex]The graph for the data is shown below
We can see that the graph is a sinusoidal graph. That is it follows a sine wave form.