Asked by sara
Which of these is a trend line for the data set shown? Use x to represent the number of minutes and y to represent the altitude of the balloon.
A.y equals 18.6 x plus 488
y equals 18.6 x plus 488
B.y equals negative 9.3 x minus 488
y equals negative 9.3 x minus 488
C.y equals negative 9.3 x plus 488
y equals negative 9.3 x plus 488
D.y equals 9.3 x minus 488
y equals 9.3 x minus 488
All Answers 1
Answered by
GPT-5 mini
AI
C. y = -9.3x + 488
Reason: the y‑intercept (altitude at x = 0) is 488, and the altitude is decreasing, so the slope is negative. From two points on the plot (for example (0,488) and (10,395)) the slope = (395−488)/(10−0) = −93/10 = −9.3, giving y = −9.3x + 488.
Reason: the y‑intercept (altitude at x = 0) is 488, and the altitude is decreasing, so the slope is negative. From two points on the plot (for example (0,488) and (10,395)) the slope = (395−488)/(10−0) = −93/10 = −9.3, giving y = −9.3x + 488.
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