Exploring Direct Variation and Proportions

What is the value of y when x equals negative 2?

• 1

• 4

• 2

• 3

What is the form of the direct variation equation?

• y = k + x

• y = kx

• y = k - x

• y = x/k

How can the direct variation constant k be rewritten?

• k = y - x

• k = y / x

• k = y * x

• k = x / y

What is the ratio of y to x when y equals 4 and x equals negative 2?

• -2:4

• 2:4

• 4:-2

• 4:2

What is the next step after setting up the ratio 4:-2 as 3:x?

• Add the ratios

• Subtract the ratios

• Apply the cross product

• Divide the ratios

What is the result of the cross product of -2 and 3?

• -4

• 4

• 6

• -6

What is the equation formed after applying the cross product?

• -6 = x

• -6 = 4x

• -6 = 2x

• -6 = 3x

What is the value of x when y equals 3?

• 2/3

• -2/3

• 3/2

• -3/2