2nd Six Weeks Test Review

Which of the following statements about the graph of x = 3 is FALSE.

• The line is vertical

• The slope is undefined

• The graph is parallel to the x-axis

What is the equation of the line that contains the point (-2, 5) and has a slope of -3?

• 
  

  $y-5=-3(x+2)$
  

• $y+5=-3(x-2)$

• $y+2=-3(x-5)$

• $y-2=-3(x+5)$

Which equation can be represented by the graph shown?

• $6x-8y=24$

• $6x+8y=24$

• $-6x+8y=24$

• $-6x-8y=24$

If the trend in the graph continues, what will be the water level on day 18? (Hint: turn the points into a table on Desmos)

• 20.5 ft

• 19.25 ft

• 21.02 ft

• 18 ft.

Which linear equation passes through (4, 7) and is perpendicular to y = 4x - 8?

• $y=-\frac{1}{4}x+8$

• $y=\frac{1}{4}x-8$

• $y=4x-9$

• $y=4x+3$

In which situation is both correlation and causation likely?

• hours spent studying and your test grade

• number of shoes you own and the size of your feet

• ice cream sales and number of sunburns

• number of schools and a city's population

If y varies directly with x, and y = 15 when x = 27, what is the value of x when y = 85?

• 153

• 47.2

• 4.7

• 1.8

What is the equation of the line of best fit for the data in the table?

• $y=-0.54x+19.80$

• $y=0.96x-0.98$

• $y=19.80x-0.54$

• $y=0.54x-19.80$

Which statement is true about the correlation coefficient of the data?

•  $r=-0.98$  ; the relationship between age and body mass has a strong negative correlation.

•  $r=-0.98$  ; the relationship between age and body mass has a strong positive correlation.

•  $r=0.98$  ; the relationship between age and body mass has a strong negative correlation.

•  $r=0.98$  ; the relationship between age and body mass has a strong positive correlation.

What is the zero (x-intercept) of  $g\left(x\right)\ =\ \frac{2}{3}x-10$  

• 15

• -10

• 0

• 2/3