2.4 Fitting linear models to data  (Page 7/14)

Determine whether the function is increasing or decreasing.

$g(x)=-x+2$

Given each set of information, find a linear equation that satisfies the given conditions, if possible.

Passes through $\left(\text{7},\text{5}\right)$ and $\left(\text{3},\text{17}\right)$

Given each set of information, find a linear equation that satisfies the given conditions, if possible.

x -intercept at $\left(\text{6},0\right)$ and y -intercept at $\left(0,\text{1}0\right)$

Find the slope of the line shown in the line graph.

Find the slope of the line graphed.

Write an equation in slope-intercept form for the line shown.

Does the following table represent a linear function? If so, find the linear equation that models the data.

Does the following table represent a linear function? If so, find the linear equation that models the data.

On June 1 ^st , a company has $4,000,000 profit. If the company then loses 150,000 dollars per day thereafter in the month of June, what is the company’s profit n ^th day after June 1 ^st ?

$\begin{array}{l}2x-6y=12\hfill \\ -x+3y=1\hfill \end{array}$

$\begin{array}{l}\begin{array}{l}\\ y=\frac{1}{3}x-2\end{array}\hfill \\ 3x+y=-9\hfill \end{array}$

$7x+9y=\mathrm{-63}$

$f(x)=2x-1$

• Line 1: Passes through $(5,11)$ and $(10,1)$
• Line 2: Passes through $(\mathrm{-1},3)$ and $(\mathrm{-5},11)$

• Line 1: Passes through $(8,\mathrm{-10})$ and $(0,\mathrm{-26})$
• Line 2: Passes through $(2,5)$ and $(4,4)$

Write an equation for a line perpendicular to $f(x)=5x-1$ and passing through the point (5, 20).

Find the equation of a line with a y - intercept of $\left(0,2\right)$ and slope $-\frac{1}{2}$ .

Sketch a graph of the linear function $f(t)=2t-5$ .

Find the point of intersection for the 2 linear functions: $\begin{array}{l}x=y+6\\ 2x-y=13\end{array}$

A car rental company offers two plans for renting a car.

• Plan A: 25 dollars per day and 10 cents per mile
• Plan B: 50 dollars per day with free unlimited mileage

How many miles would you need to drive for plan B to save you money?

Find the area of a triangle bounded by the y axis, the line $f\left(x\right)=10-2x$ , and the line perpendicular to $f$ that passes through the origin.

A town’s population increases at a constant rate. In 2010 the population was 55,000. By 2012 the population had increased to 76,000. If this trend continues, predict the population in 2016.

The number of people afflicted with the common cold in the winter months dropped steadily by 50 each year since 2004 until 2010. In 2004, 875 people were inflicted.

Find the linear function that models the number of people afflicted with the common cold C as a function of the year, $t.$ When will no one be afflicted?

Find the linear function y , where y depends on $x,$ the number of years since 1980.