what is x when y=0?
the intercept indicates how long it will take for sales of such cell phones to stop.
After 2009 the sales of new cell phones without cameras began declining. The number of people y (in thousands) who bought a cell phone without a camera can be estimated by the equation y=−30x+270
y=-30x+270, where x is the number of years after 2009.
a) Find the x-intercept as an ordered pair.
b) Write a sentence explaining the meaning of the answer to part (a).
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