Algebra 2 Unit 9 Lesson 7

5) Find the vertex.

(1,3)

4) Subtract.

-6 9 -1 0 1 -4 5 -6 5 3 5 -7

6) Find the quotient.

5x'3-13x'2+2x-2+ -1/x+2

regression model

a function that estimates the relationship among two variables

2) Use a graphing calculator for the following problem. If using a Casio fx-9750GII, follow the steps outlined in the Lesson to determine the linear, quadratic, or exponential equation that best models the data. For a linear model, round the slope and -intercept to the nearest integer. For a quadratic model, round the coefficients to the nearest integer. For an exponential model, round to the nearest integer and to the nearest tenth. Time Since Opening (hours) Customers Served 0 10 0.25 25 0.5 30 0.75 75 1 100 1.25 135 1.5 140 1.75 100 2 78 2.25 50 2.5 45 2.75 25 3 15

y=-49x'2+147x-2

3) Use a graphing calculator for the following problem. If using a Casio fx-9750GII, follow the steps outlined in the Lesson to determine the linear, quadratic, or exponential equation that best models the data. For a linear model, round the slope and-intercept to the nearest integer. For a quadratic model, round the coefficients to the nearest integer. For an exponential model, roundto the nearest integer andto the nearest tenth. Elapsed Time (hours) Amount 1 58 2 34 3 20 4 14 5 7 6 4 7 2.5

y=100e'-0.5x

1) Use a graphing calculator for the following problem. If using a Casio fx-9750GII, follow the steps outlined in the Lesson to determine the linear, quadratic, or exponential equation that best models the data. For a linear model, round the slope and -intercept to the nearest integer. For a quadratic model, round the coefficients to the nearest integer. For an exponential model, round to the nearest integer and to the nearest tenth. Temperature (°F) Cricket Chirps per Minute 56 70 61 94 64 113 72 130 75 148 81 175 86 190 89 215

y=4x-158