Problem Solving & Data Analysis Flashcards
7 cards from real SAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Problem Solving & Data Analysis flashcards as text
A scatterplot shows a strong positive linear association. As x increases, y tends to:
Answer: Increase
A positive association means y increases as x increases.
A line of best fit is y = 2x + 3. What is the predicted y when x = 5?
Answer: 13
y = 2(5) + 3 = 10 + 3 = 13.
In the model y = 2x + 3, what does the slope of 2 represent?
Answer: The change in y per unit increase in x
Slope is the rate of change of y for each one-unit increase in x.
A correlation coefficient of r = -0.95 indicates:
Answer: A strong negative linear relationship
An r value close to −1 indicates a strong negative linear relationship.
Which type of model best fits data that doubles at a constant percentage rate?
Answer: Exponential
Constant percentage growth is modeled by an exponential function.
Using y = -3x + 12, what is the value of x when y = 0?
Answer: 4
Setting 0 = −3x + 12 gives 3x = 12, so x = 4.
If a residual in a regression model is negative, the predicted value is:
Answer: Greater than the actual value
Residual = actual − predicted, so a negative residual means predicted exceeds actual.