Posted by **Mary** on Tuesday, March 8, 2011 at 6:14pm.

Explain how to use a graph to determine the number of solutions of a system?

- Algebra -
**MathMate**, Tuesday, March 8, 2011 at 11:04pm
Plot the graph of the function f(x), and find out where the graph intersects the x-axis, which means that f(x)=0, or a real solution exists. The corresponding value of x is a real root of the equation.

Note that complex roots, if any, are not shown on a graph. Also, multiple roots are not so obvious. The x-axis *may* appear as a tangent to the curve.

## Answer this Question

## Related Questions

- Math - Have to explain how to use a graph to determine the number of solutions ...
- algebra - How many solutions does the following system have: 6x - 3y = 9 2x - y...
- math - How many solutions does the following system have: 2x + 5y = 10 3x + 6y...
- algebra 2 - Classify the system , and determine the number of solutions. This ...
- algebra 2 - use a graphing calculator to graph the function y=x^2-3x+15. a. what...
- Algebra 1 (Reiny) - Will you please explain the steps I must take in order to ...
- Math - Can someone please check my work for me? Write an equation of the line ...
- math - You and your friend are saving for college. You have $50 and are added $...
- Algebra - Make a conjecture about the solution of a system of equations if the ...
- algebra 2 - Classify the system {-7x-6y=4 -28x-24y=16 , and determine the number...