Math 9 Quiz #1

If m varies directly as n, then m=kn.

If m varies directly as b, then m = nb.

If m varies directly as the square root of n, then

If m is directly proportional to n, the equation must be written as _____________.

If a and b are dependent and independent variables respectively, which equation shows inverse variation?

If

In a direct variation, if the independent variable is doubled, what will happen to the dependent variable?

If y is directly proportional to (3x + 2) and y=4 when x=2, find y when x=6.

The electric current I (in amperes) of an electric circuit varies directly as the voltage V. When 24 volts is applied, the current is 8 amperes. Find the current when 12 volts is applied.

The amount (A) that a family gives to charitable institution varies directly as its income (I). Last year, the family earned Php 1 600 000 and gave Php 128 000 to charity. How much will they give if they earned Php 2 100 000 this year?