Solution:
Given:
[tex]y=20x+0[/tex]
Comparing the equation of the model to the equation of a straight line,
[tex]\begin{gathered} y=mx+b \\ where: \\ m\text{ is the slope } \\ b\text{ is the y-intercept} \\ \\ Comparing\text{ the equation to }y=20x+0 \\ m=20 \\ b=0 \\ Hence,\text{ the y-intercept of the model is 0} \end{gathered}[/tex]
The y-intercept is the y-value when x = 0.
This means when the temperature was 0 degrees celsius, there were no sales of ceiling fan.
Therefore, the number 0 means no sale of fan was made when the temperature was 0 degrees celsius.
