Answer:
1
Step-by-step explanation:
Gradient (slope) = change in y / change in x
(6-5) / (3-2) = 1/1 = 1
The gradient is 1
Both graphs have a point in which the x value is negative two.
A. When the key reaches the ground, h = 0.
0 = -16t^2 + 64
16t^2 = 64
t^2 = 4
t = 2 seconds.
B. The reasonable domain of the function is [0, 2], since the function does not hold when the key reaches the ground. The range of the function is [0, 64] which corresponds to the domain.
(4,2) is is the distance from these coordinates
A certain journey by train takes 5 hours at the speed of 45 km/h. What will be the speed of the train to complete the same journey in 3 hours?