The height of a wave in California varies directly with the seonds that pass by. After 4 seconds, the waves are 6 feet high. How long before the waves are 20 feet high? Rounf your answer to the nearest thousandths place.
_______
-6/5
5/2
2/3
-5/6
What is the slope of the line whose equation is 2y = 3x + 4?
2
3/2
2/3
3
Which is an equation of the line with a slope of 1/4 and a y-intercept of -2?
4x – y = 2
4x + y = -2
x – 4y = 8
x + 4y = -8
Identify the equation of the line graphed below.
2x – y = 1
x + 2y = -2
x – 2y = 2
2x + y = -1
Which line has an x-intercept of -1 and a y-intercept of 1?
x – y = 1
x + y = 1
y = -x
x – y = -1
What is the slope of the line x = -5?
-5
undefined
5
0
Write the equation of the line that passes through the point (2, -1) and has a slope of -3.
y = -3x + 5
y = -3x + 1
y = -3x – 5
y = -3x – 1
Write the equation of the line that passes through the point (-4, -9) and has a slope of 1/2 .
Which is the equation of the line that passes through the points (-4, 3) and (2, -6)?
Which is the equation of the line that passes through the points (-4, 8) and (1, 3)?
y = x + 12
y = -x + 12
y = -x + 4
y = x + 4
The equation of the line is y = 6. The slope is 0.
The equation of the line is x = 6. The slope is 0.
The equation of the line is y= 6. The slope is undefined.
The equation of the line is x= 6. The slope is undefined.
Which equation represents a line parallel to the y-axis?
y = 4
y = x + 4
y = x
x = 4
3x + 5y = 5
5x – 3y = 27
5x + 3y = 21
3x – 5y = 20
What is the equation of the line that passes through the point (3, -1) and is perpendicular to the equation y = -3x + 2?
y = -3x + 8
y = -3x
Which graph best represents y = −4(x + 3) − 2?
Hint: find the slope, y intercept & x intercept.
Marsha recorded the time it took six children of different ages to run one lap around the track. Using the line of best fit, which is closest to the length of time it should take Marsha’s 8 year old son to run one lap?
176 seconds
182 seconds
168 seconds
190 seconds
A construction manager is monitoring the progress of the build of a new house. The scatterplot and table show the number of months since the start of the build and the percentage of the house still left to build. A linear function can be used to model this relationship.
y = 97.8x − 13.5
y = −13.5x + 97.8
y = 7.3x − 97.8
y = −13.5x + 7.3
The x- intercept of the graph is 6.
The zero of the function is 1/2.
The slope of the graph is 1/2
The y-intercept of the graph is 6.
What is the equation in slope-intercept form of the line that passes through the point (-2,7) and is parallel to the line represented by y=1/2x - 5 ?
y = -2x -5
y = -2x + 7
The worker packed 37 items in boxes per minute.
The worker packed 4 items in boxes per minute.
The worker packed 15 items in boxes per minute.
The worker packed 8 items in boxes per minute
16
8
32
256
A university will spend at most $4,500 to buy monitors and keyboards for a computer lab. Each monitor will cost $250, and each keyboard will cost $50. Which inequality represents all possible combinations of x, the number of monitors, and y, the number of keyboards, the university can buy for the computer lab?
50x + 250y < 4,500
250x + 50y < 4,500
250x + 50y ≤ 4,500
50x + 250y ≤ 4,500
What are the slope and the y-intercept that best represent this linear function?
Move the correct answer to each box. Each answer may be used more than once. Not all answers will be used.
Slope:______
Y-Intercept:_______
Select 3 answers:
Which lines have a y-intercept of 5? Check all that apply.