Pls help me on this question pls and tell me how u got the answer

(mc 02.03) what set of reflections and rotations would carry rectangle abcd onto itself? reflect over the y-axis, reflect over the x-axis, rotate 180° rotate 180°, reflect over the x-axis, reflect over the line y=x reflect over the x-axis, rotate 180°, reflect over the x-axis rotate 180, reflect over the y-axis, reflect over the line y=x

What is the slope of the line shown below?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?