The population, in millions, of a city t years after 1990 is given by $p=2.5+0.07 \mathrm{t}$. Find the slope and y-intercept of the equation and explain what each signifies.
A) 0.07 million is the population of the city in 1990 and 2.5 million is the increase per year in the population .
B) 2.5 million is the population of the city in 1990 and 0.07 million is the increase per year in the population .
C) 2.5 million is the population of the city in 1990 and 0.07 million is the decrease per year in the population .
D) 2.5 million is the population of the city in 1991 and 2.57 million is the population in 1992.

Question

Quizplus · Accepted Answer

The equation is in the form $p=mt+b$, where $m$ is the slope and $b$ is the y-intercept. Here, 0.07 million/year is the slope, indicating the annual population increase, and 2.5 million is the y-intercept, representing the population in 1990.

The Population, in Millions, of a City T Years After p=2.5+0.07tp=2.5+0.07 \mathrm{t}p=2.5+0.07t

The Population, in Millions, of a City T Years After $p=2.5+0.07 \mathrm{t}$