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Which inequality matches the graph?

-2x + 3y > 7
2x-3y <7
-3x + 2y ≥ 7
3x - 2y ≤ 7

Which inequality matches the graph? -2x + 3y > 7 2x-3y <7 -3x + 2y ≥ 7 3x - 2y-example-1

1 Answer

3 votes

The correct option is the second inequality:

2x - 3y < 7

Let's find the inequality:

Here we have a linear inequality, we can see a dashed line, and the region shaded is above the line, then we can write the inequality as:

y > line

y > ax + b

We can see that the line passes through (2, -1) and (5, 1)

Then the slope of the line is:

a = (1 + 1)/(5 - 2) = 2/3

y > (2/3)x + b

To find the value of b, we can replace the point (2, -1) so we get:_

-1 = (2/3)*2 + b

-1 = 4/3 + b

-1 - 4/3 = b

-7/3 = b

The inequality is:

y > (2/3)*x - 7/3

3y > 2x - 7

7 > 2x - 3y

User Syberdoor
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