Can I still use the equation that I generated from my curve when doing the experiment even if the number I want to calculate is bigger than the last point in my curve ( ps the curve is a best fit line) would my answer be accurate??

That is called "extrapolation". The answer is of course "maybe" :)

If you have generated an equation from a best-fit line to represent the relationship between two variables, you can use that equation to estimate values even if the desired value is outside the range of your data points. However, it's important to note that the accuracy of your estimate may be limited.

When you use an equation derived from a curve or best-fit line, you are essentially assuming that the relationship between the variables continues beyond the last data point. This assumption may hold true in some cases, but it may also introduce some uncertainty or error in your results. Here are a few things to consider:

1. Extrapolation: When you use the equation to estimate a value beyond the range of your data, you are extrapolating. Extrapolation is inherently more uncertain than interpolation (estimating within the range of your data points).

2. Validity of the equation: The accuracy of your estimate depends on how well the equation fits your data. If the equation provides a good fit to your data, it's more likely to yield accurate estimates. However, if the equation does not accurately represent the underlying relationship, your estimates may be less reliable.

3. Contextual knowledge: Consider the context of your experiment and any relevant scientific principles. If the variable you want to calculate is expected to follow a specific pattern or have certain constraints beyond the range of your data, incorporating that knowledge into your estimate can improve its accuracy.

In summary, while you can use the equation derived from your best-fit line to estimate values beyond the range of your data, exercise caution and keep in mind the limitations and potential sources of error. Whenever possible, it is advisable to gather additional data points within the desired range to improve the accuracy of your estimates.