overwrite the x values as needed to see more
results.
Note: In the Function Table view, press - to display and edit the Table Setup wizard
as needed.
³ Problem
Find the vertex of the parabola, y = x(36 - x) using a table of values.
Reminder: The vertex of the parabola is the point on the parabola that is also on the
line of symmetry.
I 1 -
z ( 36 U z )
< - <
15 $ 3 $ $
<
After searching close to x = 18, the point (18,324) appears to be the vertex of the
parabola since it appears to be the turning point of the set of points of this function. To
search closer to x = 18, change the Step value to smaller and smaller values to see
points closer to (18,324).
³ Problem
A charity collected £3,600 to help support a local food kitchen. £450 will be given to the
food kitchen every month until the funds run out. How many months will the charity
support the kitchen?
Reminder: If x = months and y = money left, then y = 3600 - 450x.
I 1
-
3600 U 450 z
< - <
0 $ 1 $ "
< <
Math Tools 49
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