STAAR TEST 4

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

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?

• $f\left(n\right)\ =\ -3n\ +\ 24$

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

• $f\left(n\right)\ =\ -3n\ +\ 64$

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

What appears to be the domain of the function graphed on the grid?

• $-1\le x\le3$

• $-1\le y\le3$

• $5.3\le x\le27$

• $5.3\le y\le27$

• 11rt - 7rw - 6tw
• 11rt + rw – 10tw

• 11rt - 7rw - 10tw

• 11rt + rw - 6tw

Which expressions are equivalent to 12x² – 48x + 48?

Select TWO correct answers.

• 12(x – 2)²

• –12(x² + 4x + 4)

• 12(x – 4)(x – 1)

• –12(x + 2)²

• 12(x² – 4x +4)

Which graph represents y as a function of x?

• 
• 
• 
• 

Find the slope of a line that passes through the given points:
(1,1) and (3,4)

• $\frac{2}{3}$

• $\frac{-2}{3}$

• $\frac{3}{-2}$

• $\frac{3}{2}$