Direct Variation

y = -1/4x

If x = -16 when y = 4, write the direct variation equation.

y = -1/3x

If x = -18 when y = 6, write the direct variation equation

y = 40

If x = -7 when y = -14, find y when x = 20.

y = 1/5x

If x = 2.5 when y = 0.5, write the direct variation equation

x = 252

If x = 36 when y = 6, find x when y = 42.

y = 3x

If x = 4 when y = 12, write the direct variation equation

y = 0.5x

If x = 8 when y = 4, write the direct variation equation.

x = -5

If y = -16 when x = 4, find x when y = 20.

y = -3x

If y = -18 when x = 6, write the direct variation equation.

y = 10

If y = -7 when x = -14, find y when x = 20.

y = 5x

If y = 2.5 when x = 0.5, write the direct variation equation

x = 10

If y = 27 when x = 6, find x when y = 45.

x = 7

If y = 36 when x = 6, find x when y = 42.

y = 1/3x

If y = 4 when x = 12, write the direct variation equation.

y = 2x

If y = 8 when x = 4, write the direct variation equation

Is there a direct variation? YES or NO

NO

k = 2

What is the constant of variation given the following ordered pairs: (0, 0) (1, 2) (2, 4) (3, 6)

k = 3/2

What is the constant of variation given the following ordered pairs: (2, 3) (4, 6) (8, 12)

y = 5/2x

What is the direct variation equation given the following ordered pairs: (0, 0) (2, 5) (4, 10)

y = 30x

What is the direct variation equation given the following ordered pairs: (0, 0) (3, 90) (1, 30)

Is this a direct variation? YES or NO

YES

What is the constant of variation? (k = ___)

k = 1.5

What is the equation for this direct variation?

y = 0.20x