MATHEMATICS 9 REVIEWER

In the formula y=kx, k represents as the _____.

• Constant

• Variation

• Direct variation

• Constant of variation

What is the constant of variation (k) of the following table?

Select the table that shows direct variation.

• a

• b

• c

• d

The variable y varies directly with z. The value of y is 36 when z = 3 Find the constant of variation (k).

What formula should we use in getting the constant of variation (k)?

• y=kx

• x=ky

• k=y/x

• k=x/y

COMPLETE THE TABLE Given that y varies directly as x, complete the following table of values.

Answer explanation

The variable b varies directly with a and when a = 1, b = -7. What is the value of b when a = 3?

• 21

• -21

• 7/3

• -7/3

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