Answer: 40°
Step-by-step explanation: The formula for calculating the size of an exterior angle is: exterior angle of a polygon = 360 ÷ number of sides. So it's 360°÷9=40°
Answer:

Step-by-step explanation:
Assume this is function is a straight line, consider the equation of the straight line: 
To find the gradient of the equation, we use any two coordinates from the table. 

We substitute the value of m in the equation:

To find c, we use the leftover coordinates, (4,0) in the equation above:

Substitute this value of c in the equation to get the function:

Answer:
needddd
Step-by-step explanation:
This equation factored out is (x+20)^2