The variables x and y vary inversely, and y = 5 when x=2, an equation that relates x and y is y = 10/x and when x = -1 then y is-10.
What is a system of equations?
A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.
The variables x and y vary inversely, and y = 5 when x=2.
We need to write an equation that relates x and y.
[tex]y = \frac{a}{x}\\5 = a/2a = 10[/tex]
Put the value of (a) in an equation
y = 10/x
when x = -1
y = 10/-1
y = -10
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