The equation \( f(t) = 2t - 6 \) is in the slope-intercept form of a linear equation, which is \( y = mt + b \), where \( m \) is the slope and \( b \) is the y-intercept.
From the equation:
- The slope \( m \) is 2.
- The y-intercept \( b \) is -6.
Therefore, the correct statement is: The slope is 2 and the y-intercept is -6.