Find the smallest positive and largest negative coterminal angle for 7.6489 radians

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

Which table represents a linear function? i'll give brainliest to first answer ^'^

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?