Thursday

January 29, 2015

January 29, 2015

Posted by **lyne** on Saturday, October 24, 2009 at 9:29pm.

xy<0

- math -
**jim**, Saturday, October 24, 2009 at 9:39pmYou'd recognise it. :-)

xy < 0 means xy is negative.

When x is 1, what values can y have? When x is 5? pi? 1,000,000,000?

When x is -1, what values can y have?

If the product of two numbers, say x * y, is negative, what do you know about those numbers? One is p------- and the other is n-------

So the graph of xy<0 is all the set of (x,y) pairs where x is p----- and y is n------ plus the set of (x,y) pairs where x is n----- and y is p------.

Note that neither x or y can be zero; that means the graph doesn't touch the axes.

**Answer this Question**

**Related Questions**

trigonometryyyyyy - Math Notation: x^2 means x raised to the second power or x ...

math graph - f(x) = abs(x-8) / x+8 how would the graph look like for this ...

math ASAP please - 4. What would the graph of y = x^2 + 1 look like? (1 point) a...

math - What would the graph look like for the linear function of y = 1/3x -4

Math - How does tanθ look like in a graph? What would it be their y values?

calculus - Piecewise f(x) = { (x^2, x<=2) (mx + b, x>2) I am not sure what...

Math - I need to figure out what the graph of f(x)= 1 / (2-3x)^3 near x=2/3 ...

Math - I need to figure out what the graph of f(x)= 1 / (2-3x)^3 near x=2/3 ...

physics - Help with physics graph sketch? sketch a postion time graph for a ...

Microeconomics - If ticket prices and ticket sales have both been increasing ...