1. Algebra, Graphs and Patterns

2. A sauce is being heated slowly
A sauce is being heated slowly. This graph shows the temperature of the sauce during the first minute.
Temperature of sauce
What was the temperature, in degrees Celsius, of the sauce after 40 seconds?
a) 66
b) 30
c) 23
d) 26

3. A sauce is being heated slowly
A sauce is being heated slowly. This graph shows the temperature of the sauce during the first minute.
Temperature of sauce
What was the initial temperature in degrees Celsius of the sauce?
a) b) c) d) 60 6

4. A sauce is being heated slowly
A sauce is being heated slowly. This graph shows the temperature of the sauce during the first minute.
Temperature of sauce
What was the coordinate of the temperature intercept? a) (0,3) b) (3,0) c) (0,6) d) (6,0)
(0,6)

5. A sauce is being heated slowly
A sauce is being heated slowly. This graph shows the temperature of the sauce during the first minute.
Temperature of sauce
How long did it take, in seconds, for the sauce to reach 200C?
a) b) c) d) 24 B

6. A sauce is being heated slowly
A sauce is being heated slowly. This graph shows the temperature of the sauce during the first minute.
Temperature of sauce
What was the increase in temperature for each 10 seconds of heating?
a) b) c) d) 5 5

7. A sauce is being heated slowly
A sauce is being heated slowly. This graph shows the temperature of the sauce during the first minute.
Temperature of sauce
How long would it take for the sauce to reach 800C?
a) b) c) d) 138 d

8. A sauce is being heated slowly
A sauce is being heated slowly. This graph shows the temperature of the sauce during the first minute.
Temperature of sauce
If the gradient is ½ and the vertical intercept is 6, what is the equation of the line?
a) C = ½ x b) C = ½ s + 6
c) C = 6 s + ½ d) s = ½ C + 6 b

9. c c x 1 2 3 y 5 The missing value is: 6 4 71 2 3 y 5
The missing value is: 6 4 7
The equation of the line is:
x = 2y + 1
x = 2y – 1
y = 2x + 1
y = 2x -1 c c

10. What is the meaning of the vertical (y) intercept?
The revenue in 1995 was