Complete the equation of the line through (2,1) (5,-8).

The slope is
1 --8 / 2 -5 = 9 / -3
= -3
b = y -mx
Using (2, 1)
b = y -mx
b = 1 --3*2
b = 7

y = mx + b
y = -3x + 7

Ac equals 35 cm long

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for