Algebra STAAR Review -CR

What is the slope of the graph of y = 12x - 19?

• $-19$
  

• $-\frac{12}{19}$

• $\frac{19}{12}$

• $12$

A golfer hit a golf ball from a tee box that is 6 yards above the ground. The graph shows the height in yards of the golf ball above the ground as a quadratic function of x, the horizontal distance in yards of the golf ball from the tee box. What is the domain of the the function for this situation?

• $0\le x\le230$

• $6\le y\le6$

• $0\le y\le36$

• $6\le x\le230$

Which value of x makes the equation 1.25(4x - 10) = 7.5 true?

• 3.5

• -1

• -0.5

• 4

The table shows the linear relationship between the average height in feet of trees on a tree farm and the number of years since the trees were planted. What is the rate of change of the average height in feet of the trees on the farm with respect to the number of years since the trees were planted?

• 14 ft/yr

• 3 ft/yr

• 7 ft/yr

• 10 ft/yr

What is the equation in slope-intercept form of the line that pases through the points (-4, 2) and (12, 6)? (Hint: use tables)

• y = 0.25x + 3

• y = 0.25x - 4.5

• y = 4x + 18

• y = 4x - 42

Which graph best represents -5y = -6x + 15? (Hint: put it in slope-intercept form.)

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A baker determined the annual profit in dollars from selling pies using p(n) = 52n -0.05n², where n is the number of pies sold. What is the annual profit if the baker sells 400 pies?

• $20,780

• $12,800

• $28,800

• $20,760

A student worked out at a gym continuously for 50 minutes. The graph show the remaining percentage of the workout as a linear function of x, the time in minutes. Which answer choice best describes the domain and range of the function for this situation?

• Domain: All real numbers greater than or equal to 0 and less than or equal to 100

  Range: All real numbers greater than or equal to 0 and less then or equal to 50

• Domain: {-2}

  Range: {100}

• Domain: All real numbers greater than or equal to 0 and less then or equal to 50

  Range: All real numbers greater than or equal to 0 and less than or equal to 100

• Domain: {100}

  Range: {-2}

The table shows the amount of pet food in cups remaining in an automatic feeder as a function of the number of meals the feeder has dispensed. Based on the table, which function models this situation?

• $f\left(n\right)\ =\ -3n\ +\ 24$

• $f\left(n\right)\ =\ -\ \frac{1}{3}n\ +\ 16$

• $f\left(n\right)\ =\ -3n\ +\ 64$

• $f\left(n\right)\ =\ -\frac{1}{3}n\ +\ 8$

The table shows a linear relationship between x and y. What is the rate of change of y with respect to x?

• $-\frac{9}{2}$

• $\frac{2}{9}$

• $-\frac{2}{9}$

• $\frac{9}{2}$