Which statement describes how to determine if a relation given in a table is a function

After applying the composition r0.90 ry to rs what are the coordinates of r' and s'? a.r'(–3, 1),  s'(–3, 5)b.r'(–1, 3),  s'(–5, 3)c.r'(1, 3),  s'(5, 3)d.r'(5, 3),  s'(1, 3)

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

Consider the function f(x)=-5x+3 what is f(-2)