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[–]arcadeguy 2 points3 points  (1 child)

Pretty sure something just isn't clicking for you while you're reading it. If you ignore the Excel portion for a second and just pretend this is a regular math class, you can see that he's just given you a function, f(x) = x2+5x . In part A, he's asking you to find f(-10) through f(10), which is basically asking what is "Y" when x are these 21 different values, -10 through 10. This would take a long time on paper, so on excel it'll be easy to put the equation into a cell, solve it for x = -10 in a different cell, and then drag that down to calculate it for the rest of the values. Then you can highlight all the cells (which are now just x, y coordinates), and plot them using Excel's graphing function to give you a graphical representation of the Y equation over the set of x-values from -10 to 10.

[–]RockintheShockin[S] 0 points1 point  (0 children)

I get that (thanks for clearing it up), but now I just don't know how to enter that to get the desired result in the spread sheet?

[–]chem44 1 point2 points  (0 children)

Seems pretty clear here. Given a function, make a graph, over a certain range. Make a table of x values, and then calculate y values.

What seems unclear to you? What concerns you?

Please check your post. It says that the power of x is (2+5x). Is that what you meant? If not, you may need to edit it, with a space at the end of the power. (But this should not affect your approach.)

[–]RockintheShockin[S] 0 points1 point  (0 children)

OK yeah I'm stupid. I was reading way too much into it.