Sharp el-9950 - Page 71

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Chapter 4: Graphing Features
7. Let’stakealookatthegraph.
The vertical axis represents
theYvalue,whileXis
representedbythehorizontal
axis. It appears that the
two diagonal lines cross at
thepointwheretheXvalueissomewherebetween2and3,
indicatingthatOrangeCabcostslessthantheother,after3
miles of traveling.
8. Next,press
t
to find the
values per graph increment.
When the traveling distance
is2miles,theTomatoCab
charges 30 cents less overall
thantheOrangeCab,but
itcosts30centsmoreat3miles.TomaketheXincrement
smaller, press
@
y
.
9. When the Table setting
window appears, move the
cursordownto“TBLStep”,
type
. 5
, and press
E
.NowtheYvalueswill
be sampled at every 0.5 mile.
10 .Press
t
to show the table again. It indicates that when the
Xvalueis2.5,bothY1andY2valuesare6.5.Itisnowclear
thatifyouaretraveling2.5milesormore,theOrangeCabcosts
less.