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Vertex Coordinates: (0.86,- 4.86) Graph:
Practice makes perfect
We want to find the minimum or maximum value of the given function.
y=-7x^2+12x-10
Because the leading coefficient is negative, we know we are looking for a maximum value to find the vertex. Now, let's draw the function on a graphing calculator. We begin by pushing the Y= button and typing the equation in the first row.
Having entered the equation in the calculator, we now push GRAPH to draw it.
Next, to find the maximum, push 2nd and TRACE. From this menu, choose maximum.
The calculator will prompt you to choose left and right bounds and to provide the calculator with a best guess of where the maximum might be.
Now we see that the vertex's coordinates are about (0.86,- 4.86).
