Write an equation for the line in the given form. slope is -4 and (8, 2) is on the line, standard form=

What is the range? can’t seem to find it out

Is there a direction u in which the rate of change of f(x,y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?