The graph's slope indicates that with each extra hour of TV time, the test score decreases by 4.
How to interpret the slope of a graph representing a situation?
Slope is defined or calculated as change in y over change in x, and could also mean unit rate. Thus, in this case, we have:
Slope = 100 - 60 / 0 - 10 = 40/-10
Slope = -4
The slope of the graph indicates that for each additional hour of TV time, the test score decreases. The negative slope suggests an inverse relationship, implying that spending more time watching TV is associated with lower test scores, as depicted by the downward trend on the graph.
In summary, we can say that: the slope of the graph shows that as the hours of TV time increase, the test score declines.