Is 1/2x-4 a function?

What is the range of the relation in the table below? x y –2 0 –1 2 0 4 1 2 2 0

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i