Describing A Formula

[nycmathguy]

Section 1.10
49-52

Question 49 describes direct variation where k = 2.

Question 50 describes inverse variation where
k = 2.

Question 51 describes joint variation where k = 1/2.

Question 52 describes direct variable and inverse variation where little k = 1/2.

Yes?

 

[MathLover1]

49, 50, and 51 correct
52. is also a joint variation (direct variation to more than one variable)

as an example in 51 of a joint variation is the area of a triangle:
A=(1/2)bh
We see that the area increases as the height and base length increase.

 

[nycmathguy]

49, 50, and 51 correct
52. is also a joint variation (direct variation to more than one variable)

as an example in 51 of a joint variation is the area of a triangle:
A=(1/2)bh
We see that the area increases as the height and base length increase.

Are you saying that 52 is wrong?

 

[MathLover1]

yes, it is a joint variation

 

[nycmathguy]

yes, it is a joint variation

Well, 3 out of 4 is not too bad.