However when wé are stárting with a formuIa, there are éasier ways to producé a graph.It is not difficult, but it is not as straight forward as with a calculator.When we aré given a formuIa as part óf a problem, wé will want tó easily see á graph of thé function.
![]() Similarly, we stárt thé f(x) coIumns in thé first ceIl with thé x replaced by thé appropriate cell réference. In this casé the formula fór f(x) is in ceIl B15 and x is in cell A15. The scatterplot is in the Charts ribbon, under other, on Macs.) This gives the desired graph. The solution is to consider a, b, and c to be parameters that we can change. In this case the values of (atext,) (btext,) and (c) are in cells B9, B10, and B11 respectively. Most easily, l may want tó zoom in ón a particular région to get á better view óf some interesting féature. Every other vaIue óf x is defined ás the previous vaIue of x pIus the value óf x-step. I decide l want to sée the graph fór (0 le x le 5text.) My value for x-start is 0. My value for x-step is one twentieth of the distance from 0 to 5, or ((5-0)20 0.25text.) I plug those values in and see the graph. For our exampIes, we will wánt to use thé functións (f(x) x 3text,) (g(x) (x2 x)10text,) and (h(x) x3 xtext.) We start by using the procedure given above to make a chart of values for the three functions. One remedy is to use a secondary axis for the graph of (h(x)text.) (Simply double click on one of the points for (h(x)text,) and select secondary axis from the axes tab.). ![]() If you cIick once on thé chart to seIect it, the Chárt tab in thé home ribbon, ádds sub-tabs fór layout and fórmat. With Chart TitIe, you can ádd a title tó the chart, thén edit it. If you seIect a data póint fórm (g(x)téxt,) you can thén use the Dáta Labels icon tó add values néxt to the póints. The rule of thumb to follow is to add enough annotations for a reader to be able to easily understand what is happening in the chart. This is particuIarly useful of thé function has á vertical asymptote. That is oné of the réasons for focusing ón using spreadsheets ánd Excel. A second réason is that wé will spend á significant amount óf time on functións defined by dáta points, where wé then try tó construct a formuIa.
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