Question 163707
equation is 2x+y=5
to make y a function of x, you need to have y on the left side of the equation.
subtracting 2x from both sides of the equation gets
y = 5-2x
y is now a function of x.
y is the dependent variable because the value of y depends on the value of x.
x is the independent variable.
you can say y = 5-2x.
or you can say f(x) = 5-2x.
or you can say y = f(x) = 5-2x.
y is the dependent variable.
x is the independent variable.
f is the function name
you could call the function by any name.
if you said y = g(x), then g is the function name, and g(x) = 5-2x.
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as it stands, though.
y = f(x) = 5-2x would be the answer you are looking for.