Draw the graph of the equation y=3x+2. From the graph , find the value of x if y=-1
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EXPLANATION.
Graph of the equation.
⇒ y = 3x + 2.
As we know that,
Put the value of x = 0 in the equation, we get.
⇒ y = 3(0) + 2.
⇒ y = 2.
Their Co-ordinates = (0,2).
Put the value of y = 0 in the equation, we get.
⇒ (0) = 3x + 2.
⇒ 3x = - 2.
⇒ x = - 2/3.
⇒ x = - 0.66.
Their Co-ordinates = (-0.66,0).
To find value of x when y = - 1.
Put the value of y = - 1 in the equation, we get.
⇒ y = 3x + 2.
⇒ (-1) = 3x + 2.
⇒ 3x + 2 + 1 = 0.
⇒ 3x + 3 = 0.
⇒ x = - 3/3.
⇒ x = - 1.
⇒ Value of x = - 1.
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Answered by
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Answer:
x = -1
Step-by-step explanation:
Putting y=0
0=3x+2
3x=2
x=0.666
Their co-ordinator=(0.666,0)
Putting x=0
y=0+2
y=2
Their co-ordinator=(0,2)
Now, putting y=-1
-1=3x+2
3x=-3
x= -1
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