Solve for x (or a, or b, or c...)
PEMDAS
Slope-Intercept Form
Direct and Inverse Variation
Distance, Rate, and Time
100
4x + 5 = -3
x = -2
100
2 x 3 + 9
15
100
This letter stands for the y-intercept in the equation for a line.
What is b?
100
This is the important difference between Direct and Inverse variations.
What is the direction of y (direct- y goes the same direction as x; inverse- y goes the opposite direction)?
100
This is what you do if you are looking for Time in a DRT problem.
What is divide Distance by Rate?
200
3 - 7x = -18
x = 3
200
4 + 5^2
29
200
These numbers stand for the slope and the y-intercept in the equation y = -5x + 4
What are -5 (slope) and 4 (y-intercept)?
200
Earning an hourly wage is an example of this type of variation.
What is Direct variation?
200
This is how far you will travel if you drive 60mph for 5 hours.
What is 300 miles?
300
x + 2 = 2x - 2
x = 4
300
7 x 5 - (8 + 7)
20
300
This is the equation of a line with a slope of -1/2 and a y-intercept of 7
What is y = -1/2x + 7?
300
This is an example from class of an Inverse variation.
What is (any of the following): salt and seed germination, price increases, speed and time, etc.
300
John traveled down I89 for 4.5 hours. If he went a total of 225 miles, he must have been driving this fast.
What is 50mph?
400
5 - 2x = 8x
x = 1/2 or x = 0.5
400
2(10 - 3) + 4 x 4
28
400
This is the formula to use when looking for the slope between two points.
What is (y2 - y1)/(x2 - x1)?
400
There is a Direct variation between the age of a tree and the number of its rings. So, as a tree ages, THIS happens.
What is an increase in the number of rings?
400
Andy and Beth live 100 miles apart. They agree to meet at the half-way point in 2 hours. This is how fast they must travel to make it on time.
What is 25mph?
500
3x + 8 = 2 - 3x
x = -1
500
4 + 3(6 - 7)^2
7
500
This number is the slope between the points (4, -3) and (-8, -3).
What is 0?
500
If Sammy reads 40 pages per hour, she will finish her book in 5 hours. If she reads 50 pages per hour, she will finish her book in just 4 hours.This is an example of ___ variation, and based on what we know, if Sammy reads 100 pages per hour, she will finish her book in this many hours.
What are "inverse" and "2 hours"?
500
Ella drove to Tom's house at 55mph. Tom's house is 77 miles away. Since Ella arrived at 5:24pm, she must have left at this time.
What is 4:00pm?
M
e
n
u