How do you solve this?!!

135°

Step-by-step explanation:

Step 1:

100° + 35° + 180° - ? = 180°        Sum of a Δ/Vertical ∠'s

Step 2:

315° - ? = 180°        Combine Like Terms

Step 3:

315° = 180° + ?        Add ? on both sides

Step 4:

315° - 180° = ?     Subtract

? = 135°

Hope This Helps :)

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value