1.)if y = -5 when x=2, find y when x= 8 2.) If y = -7 when x = -21 what is the value of x when y= 9

These are two different questions obviously if you could answer both that would be great thanks!

Apolygon is shown on the graph: a polygon is shown on the coordinate plane. vertices are located at 3 comma 5, 1 comma 3, 1 comma 1, 2 comma 0, 4 comma 0, 5 comma 1, and 5 comma 3. what effect will a translation 3 units down and 2 units left have on the polygon? be sure to address how it could impact the angles, side lengths, and congruency between the original pre-image and the image. xd i need