To write the equation for the line of best fit, it typically follows the format \( y = mx + b \) where \( m \) is the slope and \( b \) is the y-intercept.
From the information provided, the equation appears to be \( y = mx - 49 \). We need to determine the value of \( m \), the slope.
Unfortunately, without the specific trend line or data points mentioned in the help video, I can’t calculate the slope \( m \).
Once you have \( m \), you can complete the equation.
For the expected value of \( y \) when \( x = 72 \), you would substitute \( x = 72 \) into the complete equation:
\[ y = m(72) - 49 \]
If you provide the slope \( m \), I can help you calculate the expected value of \( y \) for \( x = 72 \).