Question 165536
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{{{c=30t+40}}} ---------> working eqn
Via given: {{{c=110}}}
{{{110=30t+40}}}
{{{(110-40)/30=t}}}
{{{t=70/30=2.33333}}} ----> 2-1/3 months
ANSWER: a
See below graph: {{{x=cost}}} vs.{{{y= months}}} -->{{{x=30y+40}}}
{{{drawing(300,300,-5,50,-5,5,grid(1),graph(300,300,-5,50,-5,5,x/30-4/3),circle(40,0,.5))}}}-- on the graph shows cost of $40 for the phone (x) even with no plan
Thank you,
Jojo</pre>