does anyone have a solution to help me

The Point at which the Function g(t) = 2t - 6 crosses x axis is where g(t) = 0
Because on x-axis : y - coordinate is zero
As g(t) is the y - coordinate and t is the x - coordinate :
⇒ g(t) = 0
⇒ 2t - 6 = 0
⇒ 2t = 6
⇒ t = 3
Option E is the Answer