Calculate the slope of the line that passes through (12,15) and (10, 21). Reduce answer to lowest terms if necessary

The answers are 20,30,80,180,960,890,1230,4560. on the first row

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

Were is the diagram?