4. Diane knows a cell phone plan costs $25 every month plus an additional fee for every text sent. Last month her bill was $26.70 and she sent 34 text. The monthly cost of the phone and number of texts are
related. Find the cost for each text.
Identify the variables in this situation: x=
y-
What is the given information in this problem (find all that apply)?
y-intercept
slope one point
a second point:
)
a. Write an equation for the situation.
b. Use your equation to find the cost of someone who sends 105 texts.