A scuba diver is 30 feet below the surface of the water 10 seconds after he entered the water and 100 feet below
the surface after 40 seconds. What is the scuba divers rate of change?
-7/3
100
Do you use points or a continuous line to make a graph or fuel vs time?
Continuous line
100
Parallel lines have ________________ slopes and perpendicular lines have slopes that are ___________
the same; negative reciprocals of each other
200
a + 5 = −5a + 5
0
200
9 > -2m + 2 - 3
m > -5 or -5 < m
200
The phone company charges $0.05 for each minute of service. Write a function to represent this relationship
c = 0.05*min
200
Michael started a savings account with $300. After 4 weeks, he had $350 dollars, and after 9 weeks, he had
$400. If you were to graph this relationship, would the slope be positive or negative?
Positive
200
Line s has a slope of 9/ 8. Line t is parallel to line s. What is the slope of line t?
9/8
300
4m − 4 = 4m
no solution
300
-138>-6(6b - 7)
b > 5 or 5 < b
300
A cab company charges $1 per cab ride, plus an additional $2 per mile driven. Write an equation that shows the relationship between the distance d and the cost c.
c = 2d + 1
300
Graph the following function: y = 2x - 3
Will do together at the board
300
Line j has a slope of -7/5. What is the slope of a line parallel to line j?
5/7
400
12 = −4(−6x − 3)
0
400
-1 -6x -6 > -11 - 7x
x > -4 or -4 < x
400
Cynthia reads 1 book each month as part of her book club. After belonging to the book club for 10 months, how many books will Cynthia have read in all?
10 books
400
Graph the following function: y = -6/7 + 5
board = we will do together
400
The equation of line t is y = -7/6x + 5. What is the slope of a line perpendicular to line t?
6/7
500
−3(4x + 3) + 4(6x + 1) = 43
4
500
3(p-3) - 5p > -3p - 6
p > 3 or 3 < p
500
A certain company rents out a car, for which you have to pay $35 as a security deposit, $25 per day and $0.10 for every mile you drive. If you drove 150 miles in 2 days, how much did you pay?
$100
500
Write an equation from the graph on the board
y = 3/2x + 2
500
The equation of line u is y=-1/6 x – 7. Parallel to line u is line v, which passes through the point (10, -5). What is the equation of line v?