Identify the region described by the shaded part in the graph above.
A
y=4x−6
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B
y≠4x−6
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C
y<4x−6
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D
y>4x−6
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Solution
The correct options are By<4x−6 Cy≠4x−6 The line represents the linear equation y=4x−6 Any other region on the given figure represents y≠4x−6 ..(i) Now writing the given equation in intercept form, we get 4x−y=6 ⇒x64−y6=1 Therefore the line cuts the x-axis at x=64 and y-axis at −6. Now consider an arbitrary point in the shaded region (x,y) which does not lie on the line to check the inequality. Consider point (10,10) 4x−6=40−6=34 and y=−6.
Hence, y<4x−6 Similarly, we can check the inequality for the shaded region by substituting points in that region, which do not lie on the line, and by comparing y and 4x−6 Hence, the correct answers are options B and C.