Algebra 1 -- Unit 4 Review -- Linear Functions

What is the equation of the line that passes through the point (2, -6) and has a slope of zero?

• x=2

• y=2

• x=-6

• y=-6

What is the equations and slope of the line shown on the grid?

• x = -4; m = 0

• y = -4; m = 0

• x = -4; m = undefined

• y = -4; m = undefined

Write an equation in slope-intercept form for a line that is parallel to
 $5x+y=10$  

•  $y=5x-3$  

•  $y=-5x+2$  

•  $y=\frac{1}{5}x-4$  

•  $y=-\frac{1}{5}x+5$  

Given the equation y = 9x - 4, what is the slope?

• $m=-\frac{4}{9}$

• $m=\frac{4}{9}$
  

• $m=9$
  

• $m=-4$
  

What is the slope of the line that passes through the points (4, -8) and (-2, 12)?

• $m=-\frac{3}{10}$

• $m=-\frac{10}{3}$

• $m=-2$

• $m=-\frac{3}{2}$

The value of y varies directly with x. If x=6, then y=18. What is the value of x when y=48?

• 16

• 144

• 8

• 288

Write an equation in slope-intercept form when given (4, -8) and (-2, 12).

• $y=-\frac{3}{10}x+\frac{16}{3}$

• $y=\frac{16}{3}x+\frac{3}{10}$

• $y=-\frac{10}{3}x-\frac{16}{3}$

• $y=-\frac{10}{3}x+\frac{16}{3}$

 $y=\frac{3}{4}x-4$  What is the equation in slope-intercept form of the line that passes though the point (-3, 5) and is perpendicular to the line represented by

•  $y=-\frac{4}{3}x+1$  

•  $y=\frac{4}{3}x+9$  

•  $y=-\frac{3}{4}x+\frac{11}{4}$  

•  $y=\frac{3}{4}x+\frac{29}{4}$  

What is the equation in slope-intercept form of the line that passes through the points (10, 7) and (5, 1)?

• $y=-5x+\frac{6}{5}$

• $y=\frac{6}{5}x-5$

• $y=-\frac{6}{5}x+5$

• $y=-\frac{5}{6}x-5$

The function y = 2.93 + 3.06(x - 2) can be used to determine the cost in dollars to fill a car's gas tank with x gallons. What is the rate of change of the cost in dollars with respect to the number of gallons (cost per gallon)?

• $2.93 per gallon

• $5.99 per gallon

• $6.12 per gallon

• $3.06 per gallon