X 0 1 2 3 4 y -1 -0.5 0 -0.5 -1 is this a linear function

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

Which function has the domain x> -11