Characteristics of Functions
Intercepts (aka “zeros”) x-intercept – the point at which the line intersects the x-axis at (x, 0) y-intercept – the point at which the line intersects the y-axis at (0, y)
Example 1: Finding the Zeros
Example 2: Find the y-intercept
Increasing/Decreasing Behavior Move left to right If your finger is moving UP then the function is increasing If your finger is moving DOWN then the function is decreasing If your finder isn’t moving up or down, than your function is CONSTANT
Example 1: Are the functions increasing, decreasing or neither?
Rate of Change Rate of Change is the average amount of change in her y-values. Rate of Change is essentially the SLOPE.
Example: Rate of Change with Points Find the rate of change, given the following points: (2,3) and (1,4)
Example: Rate of Change with functions Find the average rate of change for f(x) = ½x + 4 from [0,3]
Guided Practice