MATHEMATICS 9 Second Quarter Exam

Which is an example of a direct variation?

• xy=10

• y = 2x

• y = 5x

• 2y = x

The cost c of mango varies directly as its weight w. This relationship is written as

• c = kw

• k = cw

• w = kc

• c = kw

Which of the following describes an inverse variation?

What mathematical statement describes the graph below? lw = 36 lw = 36 136 = w w36 = l

If y varies directly as x and y = 12 when x = 4, find y when x = 12.

• 3

• 4

• 36

• 48

If y varies inversely as x, and y = 1/5 when x = 9, find y when x = -3.

• 5

• 1/3

• 3/5

• -3/5

If h varies jointly as j2 and I and inversely as g, and h= 50 when j = 2, I = 5, and g = ½, find h when j = 4, I = 10, and g = ¼.

• 25

• 100

• 800

• 805

Which of the following is TRUE about zero exponent?

Which of the following is equal to -4d0?

• 1

• -1

• 4

• -4

Which of the following statements is TRUE?