Answer:
No, it is not.
Explanation:
One <em>x </em>value (-3) has more than one corresponding <em>y </em>value (1 and 0). In a proper function, each <em>x </em>value has one and only one corresponding <em>y </em>value.
Use the substitution method for x
y= 2(2)+5
y=9
Answer:(2,9)
Answer: 421.20 km
Step-by-step explanation:

421.20km
9/16
7 of the squares are 4 so we just substract that from the total of 16 and we get 9