Do Now: Variation and Sequence

Write the equation of the following variation:

a varies jointly as d and the square of e and inversely as b

Write the equation of the following variation:

x varies directly with the cube of y and inversely with the square root of z

Suppose y varies jointly as x and z.

If y=5 when x=3 and z=4,

what is the constant of proportionality?

• 9

• 27

• 21

• 18

What is the explicit formula of the sequence given below?

10, 7, 4, 1, -2, ...

What is the recursive formula of the sequence given below?

-2, 10, -50, 250, ...

What is the 43rd term of the sequence

-6, -1, 4, ...

• 204

• 199

• 209

• 194