Prediction Using the Resulting Equation

How to Subscribe
MLS & MLT Comprehensive CE Package
Includes 176 CE courses, most popular
$109Add to cart
Pick Your Courses
Up to 8 CE hours
$55Add to cart
Individual course$25Add to cart
Need multiple seats for your university or lab? Get a quote
The page below is a sample from the LabCE course Linear Regression Analysis. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

Learn more about Linear Regression Analysis (online CE course)
Prediction Using the Resulting Equation

Once the parameters have been calculated, the resulting equation can be used to make predictions about a value of y given a value of x, provided that the x value is in the same range of x-values that were used to derive the equation.
In this example, we have calculated a=0 and b= 0.002
If x = 350 mg/dL, what is the expected value of y? To find the answer, substitute the known value of x into the equation.
y = a + bx
y = 0 + (0.002)(x)
y = 0.002(x)
y = 0.002(350)
y = 0.7 = absorbance
When the concentration is 350 mg/dL, we expect the absorbance to be about 0.7.