Posted by JOJO on Saturday, May 3, 2008 at 5:58am.
hello
Can someone please help me with solving simultanaous equations using graphs
My problem is that i don't know how to plot them on the actal graph and nor I know how to plot the gradient withing this paticular situation
I need help with some steps please
MY IGCSE's are coming
thanx

Maths  drwls, Saturday, May 3, 2008 at 11:10am
I assume you are talking about linear (straight line) equations that can be written in the form y = mx + b
m is the slope or gradient. You don't plot it, but you can use it to plot each line on a graph. Start at the yintercept (b) and draw a line with slope m.
The largest number of simultaneous equations that you can solve with graphing is two. The solution occurs where the lines intersect.
If you have three equations, you are really looking for a place where three planes intersect, and that is too hard to draw on a graph.

Maths  drwls, Saturday, May 3, 2008 at 12:05pm
This website, with an actual graph, may explain the procedure for plotting a single equation better than I can with just words.
http://www.math.com/school/subject2/lessons/S2U4L3GL.html

Maths  value, Tuesday, December 27, 2016 at 2:48am
whate
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