To find the y-intercept and rate of change from the given data:
The y-intercept is the value of y when x is equal to zero. However, none of the x-values given in the data are zero, so we cannot directly determine the y-intercept from the given data.
The rate of change, also known as the slope of the line, can be found by calculating the difference in y-values divided by the difference in x-values. Let's choose two points from the given data to calculate the rate of change.
Using the points (-2, 80) and (2, 40):
Rate of change = (change in y) / (change in x)
= (40 - 80) / (2 - (-2))
= (-40) / 4
= -10
Therefore, the rate of change is -10.
In summary:
Y-intercept: Cannot be determined from the given data.
Rate of change: -10.