Variations pre-test

y=kx

If y is 16 and x is 2, what is k equal to?

• 4

• 2

• -4

• 8

y=k/x

If y is 20 and x is 5, what is k equal to?

• 100

• 4

• 6

• -100

y=kx

If x is 4 and k is 21, what is y equal to?

• 80

• 84

• 25

• 6

If 5 donuts cost 60 baht, how many donuts can I buy for 100 baht?

• 15

• 10

• 8

• 9

y=kx

If we increase the value of x, what happens with y?

• y will remain the same

• y will also increase

• y will get smaller

y=k/x

If we increase the value of x, what happens with y?

• y will remain the same

• y will also increase

• y will get smaller