Unit 3B Review

What is the solution to the equation?

 $11x-4\left(3x-2\right)=5\left(x-2\right)$  

*Type the number only.*

What is the equation of a line that passes through $\left(-6,\ 10\right)$  and has a slope of zero?

•  $x=-6$  

•  $x=10$  

•  $y=10$  

•  $y=-6$  

Two points are plotted on the grid.

Which equation in Slope-Intercept Form best represents the line that passes through these two points?

The table shows the duration of a geyser eruption and the time until the next eruption.

What does the correlation coefficient for the data indicate about the strength of the linear association between the length of eruptions and the time between them?

• Strong positive correlation

• Weak positive correlation

• Strong negative correlation

• Weak negative correlation

The first five terms in a pattern are shown below. 

 $0.5,\ -0.25,\ -1,\ -1.75,\ -2.5,\ ...$  

If the pattern continues, which expression can be used to find the  $nth$  term?

•  $-0.25n+1.25$  

•  $-0.75n+0.5$  

•  $-0.25n+0.5$  

•  $-0.75n+1.25$  

The graph of a linear function is shown on the grid.

Which equation is best represented by this graph?

What is the equation in slope-intercept form of the line that passes through the point $\left(10,\ -8\right)$ and is perpendicular to the line represented by  $y=\frac{5}{6}x+1?$   

•  $y=-\frac{6}{5}x-\frac{49}{3}$  

•  $y=-\frac{6}{5}x+4$  

•  $y=\frac{6}{5}x-20$  

•  $y=\frac{5}{6}x-\frac{49}{3}$  

The table and scatter plot shows the hard drive capacities in gigabytes and the price in dollars for laptops.

What is the best prediction of the price of a 16 gigabyte hard drive?

• $1,778

• $1,669

• $1,887

• $1,556

The table shows the linear relationship between the number of foam hands ordered and the cost of ordering them.

The rate of change is $_______ per foam hand.

In a sequence of numbers, $a_4=28,\ a_5=40,\ a_6=52,\ a_7=64,\$  and  $a_8=76.$  

Based on this information, which equation can be used to find the  $nth$  term in the sequence,  $a_n?$  

•  $a_n=20n-12$  

•  $a_n=-12n+20$  

•  $a_n=12n-20$  

•  $a_n=-20n+12$