The graph below describes the journey of a train between two cities. 120
a) Work out the
acceleration, in km/h?,
in the first 15 mins.
100
80
Work out the distance
between the two cities. 60
Velocity (in km/h)
40
Work out the average
speed of the train during 20
the journey
0
9am
11am
10am
Time

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.