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).
what is x when y=0?
the intercept indicates how long it will take for sales of such cell phones to stop.