Answer:
you need to include the units for both axis to be able to answer this
Step-by-step explanation:
average speed in uniform motion is the slope anywhere on the line but you could always pick 2 points and do it that way and speed is just rise over run
or y2-y1/x2-x1
Pick two points on the line and determine their coordinates.
Determine the difference in y-coordinates of these two points (rise).
Determine the difference in x-coordinates for these two points (run).
Divide the difference in y-coordinates by the difference in x-coordinates (rise/run or slope).
the second bit i think they are looking for this calculation y = mx + b, where m is the slope and b is the y-intercept (where the line crosses the y axis (the vertical one that has no units
Then use that formula for the last question and put in the x value of 10 and complete the formula to find out what y is