How can you tell if a table is proportional or non proportional?

Lassify the function as linear or quadratic and identify the quadratic, linear, and constant terms. f(x) = (3x + 2)(−6x − 3) linear function; linear term: −21x; constant term: −6 linear function; linear term: −18x2; constant term: −6 quadratic function; quadratic term: 6x2; linear term: 24x; constant term: −6 quadratic function; quadratic term: −18x2; linear term: −21x; constant term: −6

What is the missing constant term in the perfect square that starts with x^2 -20x

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle