Taking the testthe graph below shows the line of best fit for data collected on the depth, in feet, and velocity, in feet per second, at ten points along the columbia river. which of the following is the equation of the line of best fit? y = -0.15x + 0.15 y = -6.67x + 2.1 y = -6.67x + 13 y = -0.15x + 1.95

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

i need more details

step-by-step explanation: