Texas Instruments TINSPIRE

Data Collection and Analysis 735
The curve fit details dialog box opens.
4. Review the data and click OK when done.
The following image is an example of curve fit (Quadratic).
Curve fit option Calculated in the form:
Linear y = m*x + b
Quadratic y = a*x^2 + b*x + c
Cubic y=a*x^3+b*x^2+c*x+d
Quartic y = a*x^4 + b*x^3 + c*x^2 + d*x + e
Power (ax^b) y = a*x^b
Exponential
(ab^x)
y= a*b^x
Logarithmic y = a + b*ln(x)
Sinusoidal y = a*sin(b*x + c) + d
Logistic (d 0)
y = c/(1 + a*e^(-bx)) + d
Natural
Exponential
y = a*e^(-c*x)
Proportional y = a*x