Draw the graph of the equation 2x-y+3=0. Using the graph find the value of y when (a) x=2 (b) x=-3.
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Step-by-step explanation:
we have 2x - y +3=0 => y= 2x+3
putting x= 0 , we get
y=(2 × 0 + 3) = 3
putting x= 1 , we get
y= (2× 1 + 3 )=5
putting x= -1 , we get
y= [2 × (-1 ) + 3 ] = 1
putting x = - 2 , we get
y=[2 × (-2) +3 = - 1
thus we have the following table ,
x. 0. 1. -1. -2
y 3 5. 1. -1
On a graph paper ,draw lines X'OX and Y'OY representing x axis and y axis respectively. On this graph paper, plot the points A ( 0,3 ) ,B (1,5) , C (-1 ,1) , D ( -2 , -1) .Join AB, AC and CD to get straight line BACD .
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