What does the a in y=ax+b (regression formula, correlation coefficient)?

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

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?