Identify the independent and dependent variables. The equation A=25w represents the area A (in square feet) of a rectangular dance floor with a width of w feet.

‘A’ would be the dependent variable
‘w’ would be the independent variable

say, y = x+3, then they value y can have depends on what the value of x is. another way to put it is the dependent variable is the output value and the independent variable is the input value. so for y = x+3, when you input x =2, the output is y = 5.

Definitely

Xis equal to three