Question

Find the quantity indicated.

r varies directly as s. Find r when s = 4 and k = 15.

Answer 1

"r varies directly as s" so this means

r = k*s

where k is some constant

Answer 2

The next bit "Find r when s = 4 and k = 15" allows us to go from

r = k*s

to

r = 15*4

r = 60

Answer 3

Thank you. You explained it as simple s possible and now I understand.

Answer 4

you're welcome