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Graph each equation or inequality
  -2x+5≤3y

Short Answer

Expert verified

The graph of the inequality -2x+5≤3y is

Step by step solution

01

Step-1 – Apply the concept of Linear Inequality

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+5as a related linear equation.

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

02

Step-2 – Calculate the boundary  

The given linear equality is -2x+5≤3y and thus the boundary which separates the coordinate plane into two region is role="math" localid="1646210171050" -2x+5=3y. As the inequality symbol is ≤and therefore the boundary line will not be a dotted line which means that the line is also included.

03

Step-3 – Write in slope intercept form

The slope intercept form is in general given by y=mx+b,wherem=y2-y1x2-x1. Therefore, the slope intercept form of role="math" localid="1646210207734" -2x+5=3y is obtained by keeping the variable y on one side and the rest (variable x, constants) on the other side.

Hence,

−2x+5=3y3y=−2x+5(rewritingtheequation)Dividethewholeequationby3,3y3=13(−2x+5)y=−2x3+53(dividingeachtermontherightsideby3)

The above equation is of the form y=mx+band hence is of the slope intercept form.

04

Step-4 – Graph the boundary line

By using the slope intercept form graph the boundary line by finding the value of y corresponding to the value ofx.

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

05

Step-5 – 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 -2x+5≤3y.

Therefore,

−2(0)+5≤3(0)⇒0+5≤0⇒5≤0

which is false.

Therefore, shade the region which does not contain (0,0).

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

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