Splash Screen. A B C D. Which expression can be used to represent fourteen less than twice the width ?. A. 14 – 2 + w B. 14 – 2 w C. 2 w + 14 D. 2 w – 14. Which expression can be used to find the number of quarts in any number of gallons?. A. B. q = 4 g C. 4 q = g
You have already graphed ordered pairs and relations on a coordinate system. (Lesson 1–4)
Example: The hours you study and your test average have a positive relationship (as your hours go up, so do your scores)
Example: The minutes a candle is burned and the height of the candle have a negative relationship (the longer you burn, the shorter the candle)
Example: The number of slices of pizza you eat and your shoe size (the is no obvious relation to these two pieces of data)Concept
Determine whether the scatter plot of the weight of a car and its miles per gallon shows a positive, negative, or no relationship. Explain your answer.
As the weight of the car (x-value) increases the miles per gallon (y-value) decreases.
Answer: negative relationship
Determine whether a scatter plot of the outside temperatures and the corresponding heating bill might show a positive, negative, or no relationship. Explain your answer.
A. As the outside temperature increases, the heating bill will decrease. This is a negative relationship.
B. As the outside temperature increases, the heating bill will decrease. This is a positive relationship.
C. As the outside temperature increases, the heating bill will increase. This is a negative relationship.
D. Outside temperature and heating bill have no relationship.Example 2
B. STUDY SKILLS The table shows hours spent studying for a test and the corresponding test score. Does the scatter plot show a relationship between hours studied and a student’s test score?
A. Yes, a positive relationship exists.
B. Yes, a negative relationship exists.
C. No, no relationship exists.
D. none of the aboveExample 3