The function graphed approximates the height of an acorn, in meters, x seconds after it falls from a tree.

after about how many seconds is the acorn 5 m above the ground?

For this case, the first thing to do is observe the vertical axis.
 We look for a height of 5 meters on the vertical axis.
 When finding the height of 5 meters we must observe for what time value this height belongs.
 For this, we observe the horizontal axis.
 The value of time is approximately:
 t = 1.7 seconds
 
 t = 1.7 seconds
 option 3