Answer:
pie is known as 3.14 the radius is 19 the r^2 is 361
Step-by-step explanation:
pie is mathmatticly know as just 3.14 the radius is half the diameter and r^2 multiplys the radius by itself like 19 times 19
X=56 Y=56
f(-3)=-2,5
f(-1)=-1,5
f(3)=¾