Answer:
Option (2) [Graph on the top right]
Step-by-step explanation:
To find the temperature decrease by 0.5 degrees every hour we will find the slopes of the lines given in every option.
Option (1) [Top left graph]
Slope = 
= 
= -10
Option (2) [Top right]
Slope = 
= -0.5
Option (3) [Bottom left]
Slope = 
= -1
Option (4) [Bottom right]
Slope = 
= -12
Therefore, Graph given in option (2) will represent the decrease in temperature by 0.5 degrees per hour.
Answer:
x = 47°
Step-by-step explanation:
The secant- secant angle (x) is half the difference of the intercepted arcs, that is
x = 
(133 - 39)° = 0.5 × 94° = 47°
Answer:
y = 3x -1
Step-by-step explanation:
When x goes up 2 units from 5 to 7, y goes up 6 units, from 14 to 20. That's 3 times as many units as the change in x.
When x goes up 4 units from 7 to 11, you goes up 12 units, from 30 to 32. That's 3 times as many units as the change in x.
So, the slope of the function is constant at 3. If y were 3x exactly, the output numbers would be 15, 21, 33, each of which is 1 higher than the actual output. Hence the output must be one less than 3x, or ...
y = 3x -1
