Answer:
We are given just x functions which means when x is 90 or 1/4 then y is 0
90 ≤ x ≤ 270 given means 90 less than or equal x
and 270 degree less than or equal to 270 degree
Meaning we join to lines up on the x axis.
The amplitude of values for g = 270-90 = 180 degree as we subtract to find g range.
We also find 90/360 ≤ x ≤ 270/360 = 1/4 ≤ x ≤ 3/4 so would show 3/4-1/4 = 2/4
The minimum value of (f) = 90 degree
The range of f = 90-270 = -180 = - 2/3
