Inequalities in Two Variables Quick Check

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Question
Which of the following points is a solution to the linear inequality y>19x−29?(1 point)
Responses

(0,−49)
left parenthesis 0 comma negative Start Fraction 4 over 9 End Fraction right parenthesis

(0,−29)
left parenthesis 0 comma negative Start Fraction 2 over 9 End Fraction right parenthesis

(0,−19)
left parenthesis 0 comma negative Start Fraction 1 over 9 End Fraction right parenthesis

(0,−13)

1 answer

To determine which point is a solution to the inequality \( y > 19x - 29 \), we will substitute the x-coordinate of each point into the inequality and check if the y-coordinate satisfies it.

The inequality is:

\[ y > 19x - 29 \]

Now, let’s evaluate each point:

  1. Point (0, -49): \[ y = -49, \quad x = 0 \] \[ -49 > 19(0) - 29 \quad \Rightarrow \quad -49 > -29 \quad \text{(False)} \]

  2. Point \(\left(0, -\frac{4}{9}\right)\): \[ y = -\frac{4}{9}, \quad x = 0 \] \[ -\frac{4}{9} > 19(0) - 29 \quad \Rightarrow \quad -\frac{4}{9} > -29 \quad \text{(True)} \]

  3. Point (0, -29): \[ y = -29, \quad x = 0 \] \[ -29 > 19(0) - 29 \quad \Rightarrow \quad -29 > -29 \quad \text{(False)} \]

  4. Point \(\left(0, -\frac{2}{9}\right)\): \[ y = -\frac{2}{9}, \quad x = 0 \] \[ -\frac{2}{9} > 19(0) - 29 \quad \Rightarrow \quad -\frac{2}{9} > -29 \quad \text{(True)} \]

  5. Point (0, -19): \[ y = -19, \quad x = 0 \] \[ -19 > 19(0) - 29 \quad \Rightarrow \quad -19 > -29 \quad \text{(True)} \]

  6. Point (0, -13): \[ y = -13, \quad x = 0 \] \[ -13 > 19(0) - 29 \quad \Rightarrow \quad -13 > -29 \quad \text{(True)} \]

From the evaluations:

  • \(\left(0, -\frac{4}{9}\right)\): True
  • \(\left(0, -\frac{2}{9}\right)\): True
  • (0, -19): True
  • (0, -13): True

The only point that satisfies the inequality is \(\left(0, -\frac{4}{9}\right)\).

Thus, the point, which is a solution to the inequality \( y > 19x - 29 \), is:

\(\left(0, -\frac{4}{9}\right)\).