Key Features of Linear & Quadratic Functions (EOC Review)

The function g(x) = 4.25x -- 255 can be used to find the amount of money raised from selling x spirit flags.

Which statement is true?

• The x-intercept of the graph of the function represents the number of spirit flags needed to be sold to cover expenses .

• The x-intercept of the graph of the function represents the amount of money spent to purchase spirit flags.

• The slope represents the total number of spirit flags sold.

• The slope represents the number of spirit flags each person purchases.

The graph of  $f\left(x\right)\ =\ -\frac{1}{4}x^2\ -\ x\ +\ 8$  is shown on the grid. What is the maximum value of f (this is your Y-value!)

The quadratic function f is graphed above.

Select the quadratic function(s) who graph has the same vertex as f above. More than one function may be selected.

• $g\left(x\right)=x\left(x-4\right)$

• $h\left(x\right)\ =\ 2\left(x-8\right)^2+8$

• $j\left(x\right)=-8x^2$

Identify the axis of symmetry for the quadratic function above.

• $x=0$

• $y=4.5$

• $x=3$

• $x=4.5$

The water level of a river was measured each day during a two-week period. The graph models the linear relationship between the water level of the river in feet and the number of days the water level was measured.

Which statement best describes the y-intercept of the graph?

• The water level increased by 0.25 ft per day.

• The maximum water level was 19.5 ft.

• The initial water level was 16 ft.

• The water level was measured for 14 days.

Which of the following lines appears to have an x-intercept of -5 and a y-intercept of 3?

• 
• 
• 
• 

The graph of the function is shown. Which ordered pair best represents the y-intercept?

• $\left(\frac{1}{3},0\right)$

• $\left(-2,\ 0\right)$

• $\left(0,\frac{1}{3}\right)$

• $\left(0,\ -2\right)$

 $f\left(x\right)=-3x+7$  What is the y-intercept of the following equation?

•  $-3$  

•  $7$  

•  $\frac{3}{-7}$  

•  $-7$  

What is the zero for the function graphed on the coordinate plane?

• $-8$

• $-3$

• $-6$

• $-9$

What is the y-intecept of the function graphed on the coordinate plane?

• 7.2

• 5.5

• $-2$

• 6