If I use **0.0000002** as DELTA X, then the results are even more precise.

Slope(6): 800.8883605725714

Slope(7): 2402.665081717714

```
// Section 1 - 16 : Rates of Change
// Using NodeJS
let slope = (time) => {
let deltaX = 0.2
let t_before = time - deltaX / 2
let t_after = time + deltaX / 2
let factor = (tf) => Math.pow(3, tf)
let deltaY = factor(t_after) - factor(t_before)
console.log(`Slope(${time}): ${deltaY/deltaX}`)
}
slope(6) // 802.5003832340008
slope(7) // 2407.5011497020023
```