Answer:
y=30x
Explanation:
If we substitute 1 from hours which is the x-axis
We get a y-value of 30 miles
If we substitute 2
We get a y-value of 60 miles
If we substitute 3
We get a y-value of 90 miles
This can be supported by the straight line equation of y=mx+c
where m is the gradient/slope and c is the y-intercept.
The y-intercept is 0 so we don't need to write that down.
We worked out the m by substituting x and y in from the graph.