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Graph each equation or inequality

 â¶Ä‰y&±ô³Ù;4x−1

Short Answer

Expert verified

The graph of the inequality y<4x-1is

Step by step solution

01

Step-1 – Apply the concept of Linear Inequality and absolute value function

A linear inequality resembles a linear equation but with an inequality symbol instead of an equals symbol.

For example, y≤x+5is a linear inequality with y=x+5 as a related linear equation.

Also, the graph of y=x+5 separates the coordinate plane into two region. The line of the this graph acts as a boundary of the two separated region.

The absolute value function, written as f(x)=xis defined as follows:

f(x)=−xifx<0xifx≥0

For examples, -2=2;2=2;3.5=3.5;-3.5=3.5

02

Step-2 – Calculate the boundary

The given linear equality is y<4x-1and thus the boundary which separates the coordinate plane into two region is y=4x-1. As the inequality symbol is< and therefore the boundary line will a dotted line which means that the line is not included.

03

Step-3 – Graph the boundary line

Find the value of y corresponding to the value of x.

x

x-1

y=4x-1

-2

−2−1=−3=34(3)=12

-1

−1−1=−2=24(2)=8

0

0−1=−1=14(1)=4

1

1−1=0=04(0)=0

2

2−1=1=14(1)=4

3

3−1=2=24(2)=8

Hence by using the values in the table, the graph is obtained as shown below:

04

Step-4 – Test a point on inequality

Choose a point which is not on a boundary line.

Since the point (0, 0) is not on a boundary line, test the point (0, 0) on the inequality y<4x-1.

Therefore,

0<40−10<4−10<4(1)0<4

which is true.

Therefore, shade the region which contain (0, 0).

Hence the graph of the linear inequality is as shown below:

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