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Sagot :
Answer: In order to determine the system of inequalities that have been graphed, we need to find the equations of the two lines. We can then use the equations to write the corresponding inequalities.
The equation of this line is given by the formula,
where m is the slope and c is the y -intercept.
From the graph,
and
Hence the equation of this line is
Since the line is not solid it means the possible inequalities are
From the graph one of the solution sets is the origin, which has coordinates,
We can test the two inequalities with this point to determine the right one. That is,
We can see that the first statement is true but the second is false.
This implies that the right inequality is;
With the solid line,the slope is
and
Hence the equation is,
Since this line is solid, the possible inequalities are;
Testing with the origin again, we have;
The second statement is true.
Hence the inequaliy of the solid line is,
Therefore the system of inequalities are;
and
Answer:
- y ≥ 1/2x +2
- y > 2x -3
Step-by-step explanation:
The equations of the boundary lines in this system of inequalities can be written from the graph in slope-intercept form. The left boundary line is solid; the right boundary line is dashed. The inequality with the solid boundary line will include the "or equal to" case. The solution space is shaded above both lines.
__
The left boundary has a slope (rise/run) of 1 square down for 2 to the right, or m=-1/2. It intersects the y-axis at y=2. Its equation is ...
y = -1/2x +2
The right boundary line has slope (rise/run) of 2 squares up for 1 to the right, or m=2/1=2. It intersects the y-axis at y=-3. Its equation is ...
y = 2x -3
__
The inequalities are then ...
y ≥ -1/2x +2
y > 2x -3
_____
Additional comment
The slope-intercept equation of a line is ...
y = mx +b . . . . . line with slope m and y-intercept b
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