Tatiana wants to buy a cake and a balloon for her friend's birthday. The store has r types of cakes and 2r-7 types of balloons. There are 15 unique combinations of a cake and a batloon. The zeros of which expression represent possible values of r?​

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c