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OpenStudy (anonymous):
whatcha need
OpenStudy (anonymous):
Identify which table shows a direct variation.
A.
both tables
B.
Table 1 only
C.
Table 2 only
D.
neither table
OpenStudy (welshfella):
for a direct variation y = kx where k is a constant
making k = y/x
for table 1 divide the values of y by the values of x to see if you get a constant value
OpenStudy (welshfella):
if they are constant then you have direct variation
OpenStudy (welshfella):
repeat for table 2
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OpenStudy (anonymous):
I dont get it :/
OpenStudy (welshfella):
Table 1:-
7.5 / 3 = ?
11.25/4.5 = ?
17.5 / 7 = ?
do these calculations
/
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
they all equal 2.5
OpenStudy (welshfella):
right so k = 2.5
and y = 2.5x
this is direct variation
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OpenStudy (welshfella):
now do the same for table 2
OpenStudy (anonymous):
so it would be A?
OpenStudy (anonymous):
oh ok
OpenStudy (welshfella):
3 / 1.5 =
12/8 =
OpenStudy (welshfella):
no you need to check table 2
table 1 is direct variation
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OpenStudy (anonymous):
Table 2 is not 2 equal 1.5 and the other one equals 6
OpenStudy (anonymous):
so it would be B
OpenStudy (welshfella):
right so Table 2 does not shgow direcxt variation
OpenStudy (welshfella):
yes B
OpenStudy (anonymous):
thx you can you help with more
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