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Graph the equation y=x^3 +1

Sagot :

Step-by-step explanation:

To graph the equation \( y = x^3 + 1 \) and provide the explanation, follow these steps:

### Explanation

1. **Understand the Function**:

- The given equation \( y = x^3 + 1 \) is a cubic function. The general form of a cubic function is \( y = ax^3 + bx^2 + cx + d \).

- In this specific equation, \( a = 1 \), \( b = 0 \), \( c = 0 \), and \( d = 1 \).

2. **Basic Shape of the Graph**:

- Cubic functions typically have an S-shaped curve.

- Since the coefficient of \( x^3 \) is positive, the graph will increase from left to right, going from negative infinity to positive infinity.

- The "+1" indicates a vertical shift upwards by 1 unit.

3. **Key Points**:

- The y-intercept occurs when \( x = 0 \): \( y = 0^3 + 1 = 1 \). Thus, the graph will pass through (0, 1).

- As \( x \) approaches negative infinity, \( y \) approaches negative infinity.

- As \( x \) approaches positive infinity, \( y \) approaches positive infinity.

4. **Symmetry**:

- The function \( y = x^3 + 1 \) is not symmetric about the y-axis or the origin, but it is symmetric with respect to the point \((0, 1)\) in terms of cubic transformation.

5. **Behavior at Critical Points**:

- Since there are no quadratic or linear terms, there are no inflection points or local maxima/minima, other than the general behavior of cubic functions.

### Graph

Let's plot the graph of \( y = x^3 + 1 \).

```python

import numpy as np

import matplotlib.pyplot as plt

# Define the function

def f(x):

return x**3 + 1

# Generate x values

x = np.linspace(-3, 3, 400)

# Generate y values

y = f(x)

# Create the plot

plt.figure(figsize=(8, 6))

plt.plot(x, y, label='$y = x^3 + 1

, color='b')

plt.axhline(0, color='black',linewidth=0.5)

plt.axvline(0, color='black',linewidth=0.5)

plt.grid(color = 'gray', linestyle = '--', linewidth = 0.5)

plt.title('Graph of $y = x^3 + 1

)

plt.xlabel('x')

plt.ylabel('y')

plt.legend()

plt.show()

```

### Explanation of the Graph

- **Intercepts**: The graph intersects the y-axis at (0, 1).

- **Behavior**:

- For negative values of \( x \), the graph falls steeply, reflecting the cubic term.

- For positive values of \( x \), the graph rises steeply.

- **Overall Shape**: The characteristic S-shape of the cubic function is evident, with a vertical shift upward by 1 unit.