7.1 & 7.2 Quiz Review September 8 th

Tomorrow’s Quiz You may use your notes Each blank is worth 5 pts Read all directions / instructions

From 7.1… Scatterplots Positive or Negative Correlation? Estimating a line of best fit I will not ask for correlation coefficients (-1, -0.5, 0, 0.5, 1)

MEDIAN-MEDIAN LINE Put these steps in your notes… 1) X’s in order – put in 3 groups 2) Median x & y (ordered pairs) 3) Equation of 2 outside pts 4) Plug middle x in equation 5) 1/3 ( Actual – Expected )

Let’s try this one… (8, 98), (9, 83), (11, 95), (12, 42), (13, 89), (13, 92) (14, 77), (15, 72), (17, 81),

THREE GROUPS FIND MEDIAN X & Y GROUP 1: (8, 98), (9, 83), (11, 95) x-values: 8…9…11 y-values: 83…95…98 GROUP 2: (12, 42), (13, 89), (13, 92) x-values: 12…13…13 y-values: 42…89…92 GROUP 3: (14, 77), (15, 72), (17, 81) x-values: 14…15…17 y-values: 72…77…81

Write the equation… (9, 95) and (15, 77)

Plug middle x in… (13, 89)

1/3 (Actual – Expected)

From 7.2… Equation in Vertex Form ( h, k ) Equation in X-Intercepts Form P and Q Find “A” then write the equation in the correct form (Vertex or Intercept)

Practice Problems… p. 248 #’s 1, 2 p. 249 # 4 p. 258 #’s 1, 2, 5, 6 Turn in these 7 problems at the end of class for a grade!