Unit 1
What is the formula for finding mean? AND what do we type into Desmos?
add all the numbers and divide by the amount we have AND mean(L)
Mr. Felty starts off the school with 350 pencils. Each day, he gives away 8 pencils. Write an equation that models this situation, using d for the days, to show when he reaches 100 pencils.
350 - 8d = 100
If the slope of a line is 3/4. What is the slope of a line parallel to it? What is the slope of a line perpendicular to it?
Parallel: 3/4
Perpendicular: -4/3
We have 2 points (1, 5) and (-3, 8). What is the slope between these 2 points?
-3/4
How many solutions does the following system of equations have? If there is a solution, solve for it.
2x + 5y = 19
x - 2y = -4
One solution at (2,3)
What are the 2 measures of variability? When do I use them?
IQR when the data is asymmetric and Standard Deviation when the data is symmetric
Tony makes $30 an hour as a Lyft driver. He also gets paid an allowance of $15 a week by his mom. He needs to make at least $250 a week to cover his rent. Write an inequality that demonstrates this situation, using h as the number of hours he needs to work.
30h + 15 ≥ 250
-4x + 10y = 20. What is the slope of this line?
2/5 or 4/10
To find the slope, what variable must be by itself?
y
How many solutions does the following system of equations have? If there is a solution, solve for it.
2x + 5y = 19
4x = -10y + 3
No solutions, the lines are parallel
What percent of the data is less than the median? What percent is greater than the median?
50% - the median divides the data into halves
Tony makes $30 an hour as a Lyft driver. He also gets paid an allowance of $15 a week by his mom. He needs to make at least $250 a week to cover his rent. Write an inequality that demonstrates this situation, using h as the number of hours he needs to work. How many hours a week must he work
at least 7.8 hours
2x + y = 10. What is the slope of a line parallel to this line and perpendicular to this line?
Parallel: -2
Perpendicular: 1/2
We have 2 endpoints at (-8, 3) and (6,0). What is the midpoint?
(-1, 1.5)
Write the equation of a line that has a slope of -2 and passes through the point (4, -2)
y + 2 = -2(x - 4)
Which of these graphs has a greater measure of center?
Males
We have the following inequality: x + 4y > -2
Which of the following are solutions?
(0, 2) (-3, 0) (-1, -2)
(0,2)
Solve the equation for y.
15x + 10y + 13 = 143
y = -15x/10 + 13
We have an endpoint at (0,4) and a midpoint at (2,0). What is the coordinate for the other endpoint?
(4, -4)
2x + 5y = 10.
What is the y - intercept of this line?
2
Which of these graphs has a greater measure of variability?
Class 2 - the IQR was higher
We have the following system of inequalities:
y > -3x + 5
y ≤ x - 2
Which of the following are part of the solution region?
(2,0) (1.67, 0) (1.75, -0.25) (6,2)
(2,0) and (6,2)
Solve the following equation for x.
-8x - 4y + 21 = 85
x = -8 - y/2
We have an endpoint at (6,6) and a midpoint at (3,1). What is the coordinate for the other endpoint?
(0,-4)
4x + y = 8.
Where does the graph intersect the x- axis ?
( , 0)
(2, 0)