Which of the following graphs represent a function

Which polynomial function has x intercepts -1, 0, and 2 and passes through the point (1, -6)

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?