Category 23 Example 1 - no calculation required
The values can be directly read from the table. The f(x) value for a certain value of x can be read from the corresponding f(x) column. The x value for a certain value of f(x) can be read from the corresponding x column.
Category 23 Example 2 - no calculation required
It can be observed from the graph that for x = -1, the value of y = 2. Count the number of times the graph intersects the x-axis at y = -2.
Category 24 Example 2 - no calculation required.
The value of g(4) can be read from the table as -6. The value of f(-6) can be read from the table as 12.
Category 25 Example 1 - no calculation required
The points where the graph passes through the x-axis or touches the x-axis can be directly read from the graph.
Tip: Passes through = 1 factor. Touches and curves back = 2 identical factors.
Category 25 Example 2 - no calculation required
Each factor is a distinct zero. Count them.
Category 25 Example 3 - no calculation required
From the x column read the values where h(x) = 0
Tip: y = 0 at x-intercept.