Which relationship shows an inverse variation?
choices:
x = 1, 2, 3, 4
y = 3, 6, 9, 12

x = 1, 2, 3, 4
y = 60, 30, 20, 15

x = 1, 2, 3, 4
y = 15, 13, 11, 9

x = 1, 2, 3, 4
y = 6, 11, 20, 35

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is