solving system of equations by graphing

User Generated

ryyroyhr

Mathematics

Description

I'm struggling with graphing two equations ... for example 3x + 2y =8 and x -4y =-12 

how do i know what number to use for x?

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Explanation & Answer

3x + 2y=8

here 

y=(8-3x)/2

so start with x=1

y=5/2=2.5

for x=2

y=1

for x=3

y=-1/2= -0.5

and so on for more values of x
scale x axis with 0,1,2,3....
and scale y axis with -1,-2-3,0,1,2,3......

and point on graph according to the value of x and y for example for x =2,   y=1 make a dot at (2,1) at the graph and do this procedure for more values of x then joint them all with straight line from one point to other

do this procedure for the other equation as well with same values of x......


Anonymous
Great content here. Definitely a returning customer.

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