high-low method
Your age is a linear function (of time).
A linear function is a function, or equation, that when graphed, will form a straight line.
A linear objective function and linear constraints.
A linear function when graphed takes the form of a straight line.
The slope of a linear function is also a measure of how fast the function is increasing or decreasing. The only difference is that the slope of a straight line remains the same throughout the domain of the line.
high-low method
No a linear equation are not the same as a linear function. The linear function is written as Ax+By=C. The linear equation is f{x}=m+b.
Assuming the domain is unbounded, the linear function continues to be a linear function to its end.
No. An exponential function is not linear. A very easy way to understand what is and what is not a linear function is in the word, "linear function." A linear function, when graphed, must form a straight line.P.S. The basic formula for any linear function is y=mx+b. No matter what number you put in for the m and b variables, you will always make a linear function.
No a linear equation are not the same as a linear function. The linear function is written as Ax+By=C. The linear equation is f{x}=m+b.
When you use linear regression to model the data, there will typically be some amount of error between the predicted value as calculated from your model, and each data point. These differences are called "residuals". If those residuals appear to be essentially random noise (i.e. they resemble a normal (a.k.a. "Gaussian") distribution), then that offers support that your linear model is a good one for the data. However, if your errors are not normally distributed, then they are likely correlated in some way which indicates that your model is not adequately taking into consideration some factor in your data. It could mean that your data is non-linear and that linear regression is not the appropriate modeling technique.
It will just be the gradient of the function, which should be constant in a linear function.
As a linear function
it is impossible for a linear function to not have a y-intercept
Your age is a linear function (of time).
No. A function need not be linear. For example, y = sin(x) is a function of x but it is not a linear equation.