Tell whether x and y show direct variation, inverse variation, or neither: xy = 1/5

Tell whether x and y show direct variation, inverse variation, or neither: y = x + 4

Tell whether x and y show direct variation, inverse variation, or neither: 4x = y

Tell whether x and y show direct variation, inverse variation, or neither: y = 2/x

Tell whether x and y show direct variation, inverse variation, or neither: x + y = 6

Tell whether x and y show direct variation, inverse variation, or neither: 8y = x

Tell whether x and y show direct variation, inverse variation, or neither: y/x = 8

Tell whether x and y show direct variation, inverse variation, or neither: xy = 12

y varies inversely with x. If y = -4 when x = 5, find y when x = 3.

y varies inversely with x. If y = 9 when x = 1, find y when x = 3.

y varies inversely with x. If y = 8 when x = -3, find y when x = 3.

y varies inversely with x. If y = 2 when x = 7, find y when x = 3.

y varies inversely with x. If y = 28 when x = 3/4, find y when x = 3.

y varies inversely with x. If y = -5/4 when x = -4, find y when x = 3.

y varies inversely with x. If y = -1/6 when x = -12, find y when x = 3.

y varies inversely with x. If y = -7 when x = 5/3, find y when x = 3.

z varies jointly with x and y. When x = 2 and y = -6, z = 24. Find z when x = -4 and y = 5.

z varies jointly with x and y. When x = 8 and y = 6, z = 12. Find z when x = -4 and y = 5.

z varies jointly with x and y. When x = -1/4 and y = -3, z = 15. Find z when x = -4 and y = 5.

z varies jointly with x and y. When x = 6 and y = -7, z = -3. Find z when x = -4 and y = 5.

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