posted by GGIFT on .
Examine the following equation:
y = -2x^2 + 20x + 1
* What shape does the graph of this equation make? (Hint: You should be able to tell just by looking at the first term of the equation.)
* Does the graph open up or down (Hint: You should also be able to answer this just by looking at the first term of the equation.)
The equation describes an upside-down parabola, opening down.
Plotting the graph yourself should help you visualize the situation. Words can be confusing.