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stich3 [128]
3 years ago
11

Determine whether y varies directly with x. If so, find the constant of variation k and write the equation

Mathematics
2 answers:
nydimaria [60]3 years ago
8 0

y/x = k

6.4/4 = 1.6

11.2 / 7 =1.6

16/10 = 1.6

20.8 /13 =1.6


This is a direct variation and the constant is 1.6

y=1.6x

Svetlanka [38]3 years ago
3 0

Answer:

y=1.6x

Step-by-step explanation:

If y varies directly proportional with x, then equation is y=kx

where k is the constant of proportionality

k=\frac{y}{x}

LEts find out k

we use the table to find the value of k, divide y value by x value

\frac{6.4}{4}=1.6

\frac{11.2}{7}=1.6

\frac{16}{10}=1.6

\frac{20.8}{13}=1.6

1.6 is a constant . so k=1.6

y=kx

Replace the value of k, the equation becomes

y=1.6 x

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