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KengaRu [80]
3 years ago
7

Helppppppppppppppppp

Mathematics
1 answer:
kondaur [170]3 years ago
6 0

Option D:

k = –2

Solution:

Let y = f(x).

<u>Direct variation:</u>

A relationship between two variables in which one is a constant multiple of the other.

<em>y varies constantly means that y = kx.</em>

The constant k=\frac{y}{x}.

Substitute x = –1 and y = 2 from the table.

$k=\frac{2}{-1}=-2

Substitute x = 2 and y = –4 from the table.

$k=\frac{-4}{2}=-2

Substitute x = 5 and y = –10 from the table.

$k=\frac{-10}{5}=-2

Therefore k = –2.

Option D is the correct answer.

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