Question

f y varies inversely as x and x = 6 when y = 15, what does y equal when x = 9? PLEASE HELP ITS A TIMED TEST

Answer 1

y = 10 when x = 9

Explanation:

y = k/x

Where,

k = constant of proportionalty

Find k when x = 6 when y = 15

y = k/x

15 = k/6

Cross product

15 * 6 = k

k = 90

what does y equal when x = 9?

y = k/x

= 90/9

y = 10

y = 10 when x = 9