To find the equation of the trend line in slope-intercept form (y = mx + b), we need to determine the slope (m) and the y-intercept (b).
From the information given in the problem, it states that the line "starts at 25 and increases by one every x value." This suggests that the y-intercept (b) is 25 and that the slope (m) is 5, as the y value increases by 5 for every increase of 1 in the x value.
To confirm this, we can look at the points given:
- From (1, 30) to (2, 35) = increase of 5 in y (from 30 to 35) corresponds to an increase of 1 in x (from 1 to 2).
- From (2, 35) to (5, 55) = increase of 20 in y (from 35 to 55) corresponds to an increase of 3 in x (from 2 to 5) = 20/3 = approximately 6.67.
- The overall trend suggests a consistent slope when averaged out.
However, we notice the first two points indicate that the slope might be around 5 if we only consider the first pair (from 30 to 35 for x 1 to 2).
Thus, the slope (m) should be calculated through the change in y for a corresponding change in x.
Let's assume the slope is indeed 5, leading to:
y = mx + b y = 5x + 25
So, the correct response is:
y = 5x + 25.