What description is correct for the polynomial? 3x4 + 2x - 9
A quadratic trinomial
B quartic trinomial
C quadratic binomial
D cubic binomial

How do you find the equation of line of best fit? urgent

I'm confused on this could anyone me and show me what i need to do to solve it.

The human resources manager at a company records the length, in hours, of one shift at work, x. he creates the probability distribution below. what is the probability that a worker chosen at random works at least 8 hours? probability distribution px(x) 6 hours 7 hours 8 hours 9 hours 10 hours 0.62 0.78 пол