I dont really understand how to do "k" in direct and inverse variations. Everything else, like absolute values and graphing , is really easy. I think I'll do pretty well on the test.
Hi Barbie - I'm not totally sure what you mean by "do k." k is just the constant number in the problem. for inverse variation, when you multiply any x,y pair, you always get the same number. that's k. for direct variation, when you take y/x for any pair, you always get the same number, that's k.
for example, an inverse relationship might be the pairs (2,6) (3,4) (-12,-1). k would be 12, because xy is always 12.
a direct relationship might be the pairs (5,10) (7,14) and (150,300). since y/x is always 2, k is 2.
I recommend you read through the Day 2 notes and work through the problems on page 2-3 of the packet for more practice.
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ReplyDeleteHi Barbie - I'm not totally sure what you mean by "do k." k is just the constant number in the problem. for inverse variation, when you multiply any x,y pair, you always get the same number. that's k. for direct variation, when you take y/x for any pair, you always get the same number, that's k.
ReplyDeletefor example, an inverse relationship might be the pairs (2,6) (3,4) (-12,-1). k would be 12, because xy is always 12.
a direct relationship might be the pairs (5,10) (7,14) and (150,300). since y/x is always 2, k is 2.
I recommend you read through the Day 2 notes and work through the problems on page 2-3 of the packet for more practice.