Question

The population of a city is currently 2,760,065. The population is increasing at a rate of 10,000 people per year. Which is the equation of the line that represents the total population, y, in terms of years, x?(1 point)
Responses

y=10,000x−2,760,065
y is equal to 10 comma 000 x minus 2 comma 760 comma 065

y=10,000x+2,760,065
y is equal to 10 comma 000 x plus 2 comma 760 comma 065

y=−10,000x+2,760,065
y is equal to negative 10 comma 000 x plus 2 comma 760 comma 065

y=2,760,065x+10,000

Answer 1

The population of a town was taken in 2010. After 3 years, the population of the town is 9,300. After 9 years, the population of the town is 8,100.

Assuming the change in population is constant each year, which is the equation of the line?

(1 point)
Responses

y=−200x+9300
y is equal to negative 200 x plus 9300

y=200x+9900
y is equal to 200 x plus 9900

y=9900x−200
y is equal to 9900 x minus 200

y=−200x+9900

Answer 2

What is the equation of the line that passes through the points (0,35)
, (−12,34)
?(1 point)
Responses

y=−310x−35
y is equal to negative 3 tenths x minus 3 fifths

y=35x−310
y is equal to 3 fifths x minus 3 tenths

y=310x+35
y is equal to 3 tenths x plus 3 fifths

y=−310x+35

Answer 3

To derive the equation that represents the population of the city over time, we can use the following analysis:

1. The current population (at \( x = 0 \)) is 2,760,065.
2. The population increases by 10,000 people each year.

The formula for a linear equation is generally given by:

\[ y = mx + b \]

where:
- \( y \) is the total population,
- \( m \) is the rate of change (slope),
- \( x \) is the number of years,
- \( b \) is the initial value (y-intercept).

In this scenario:
- The slope \( m \) is 10,000 (the annual increase in population).
- The y-intercept \( b \) is 2,760,065 (the current population).

Thus, the equation can be written as:

\[ y = 10,000x + 2,760,065 \]

So, the correct response is:

**y = 10,000x + 2,760,065**.

Answer 4

To find the equation of the line representing the population change in the town, we can start by identifying the known point values:

1. In 2013 (3 years after 2010), the population is \( y = 9300 \).
2. In 2019 (9 years after 2010), the population is \( y = 8100 \).

We can express these points as:
- Point A: \( (3, 9300) \)
- Point B: \( (9, 8100) \)

Next, we'll calculate the slope \( m \) of the line using the two points:

\[
m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{8100 - 9300}{9 - 3} = \frac{-1200}{6} = -200
\]

So, the slope of the line is \( -200 \).

Now we can use the slope-intercept form of a linear equation:

\[
y = mx + b
\]

To find the y-intercept \( b \), we can use one of the points. Let's use point A \( (3, 9300) \):

\[
9300 = -200(3) + b
\]

Calculating the right side:

\[
9300 = -600 + b
\]

Now, solving for \( b \):

\[
b = 9300 + 600 = 9900
\]

Now we have the slope \( m = -200 \) and the y-intercept \( b = 9900 \). Therefore, the equation of the line representing the population of the town is:

\[
y = -200x + 9900
\]

Thus, the correct response is:

**y = −200x + 9900**.

Answer 5

To find the equation of the line passing through the points \( (0, 35) \) and \( (-12, 34) \), we can follow these steps:

1. **Identify the two points:**
- Point A: \( (0, 35) \)
- Point B: \( (-12, 34) \)

2. **Calculate the slope \( m \) using the slope formula:**
\[
m = \frac{y_2 - y_1}{x_2 - x_1}
\]
Here, \( (x_1, y_1) = (0, 35) \) and \( (x_2, y_2) = (-12, 34) \):
\[
m = \frac{34 - 35}{-12 - 0} = \frac{-1}{-12} = \frac{1}{12}
\]

3. **Use point-slope form of the equation of a line:**
We'll use the point-slope form, which is:
\[
y - y_1 = m(x - x_1)
\]
Using point A \( (0, 35) \):
\[
y - 35 = \frac{1}{12}(x - 0)
\]
Simplifying:
\[
y - 35 = \frac{1}{12}x
\]
\[
y = \frac{1}{12}x + 35
\]

4. **Convert to slope-intercept form:**
The y-intercept is 35, and the slope is \( \frac{1}{12} \), but we need to see if any of the given responses match after checking for mistakes in calculation for slope terms because the slope values don't seem to match the responses given.

Let’s double-check:
- The slope \( m \) was calculated as \( \frac{1}{12} \).
- We see \( (0, 35) \) was used correctly.

Thus the equation derived is \( y = \frac{1}{12}x + 35 \), but none of the options are clearly correct to match that.

Let’s re-evaluate what the closest match would be in terms of the calculation made above from the point insight or what \( x \) would influence, generally these correct that they won't be significant enough.

Assuming my calculation appears correct and specific changes led me astray, check among the nearest ones:
- The mistake could be arising from not getting a negative factor correctly calculated since it doesn't fit conventions expected in analyzing generally.

**Final conclusion:** There seems to be an error in your options as none clearly match the derived line; however, assuming adjustments: the correct format from directly matches to a basic negative integration would similar.

**y = −310x + 35** would then become the workable representative format aspect from adjusting negative factor integration downstream.