Objective- To write linear equations to describe

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Presentation transcript:

Objective- To write linear equations to describe situations and solve problems. Snowflake Problem Instance: 1 2 3 4 Number of Chips: 7 13 19 25 I C Let I = Instance or Design #. 1 7 2 13 3 19 4 25 5 31 Let C = Number of Chips Used. 6 6 C is dependent on I 6 C = ___I + ___ 6 1 6

Objective- To write linear equations to describe situations and solve problems. Snowflake Problem Instance: 1 2 3 4 Number of Chips: 7 13 19 25 I C Let I = Instance or Design #. 1 7 2 13 3 19 4 25 5 31 Let C = Number of Chips Used. 6 6 C is dependent on I Change Start Value 6 C = I + 6 1 6

Objective- To write linear equations to describe situations and solve problems. Instance: 0 1 2 3 4 Snowflake Problem Number of Chips: 7 13 19 25 I C Let I = Instance or Design #. 1 7 2 13 3 19 4 25 5 31 Let C = Number of Chips Used. 6 6 C is dependent on I Change Start Value 6 C = I + 6 1 6

$1.65 + 0.25 = $ 1.90 Let p = price of salad p = 0.25 w + 0.40 This chart shows the price of salad at a local market. 1) How much would a 6 oz salad cost? $1.65 + 0.25 = $ 1.90 0.25 0.25 2) Write an equation for the cost of a salad that weighs w oz. 0.25 0.25 Let p = price of salad 3) How much would a 10 oz salad cost? p = 0.25 w + 0.40 p = 0.25 w + 0.40 Change Start Value p = 0.25 ( 10 ) + 0.40 p = 2.50 + 0.40 = $2.90

A taxi cab charges a flat rate of $2.50 and 15 c per mile. Write a linear equation for the charge in terms of the number of miles driven. Let C = charge in dollars Let m = # of miles driven C = 2.50 + 0.15 m Start Value Change

A phone company charges $17.50 for the first 30 minutes of toll charges and 12 c for each additional minute . Write a linear equation for the charge in terms of the number of minutes. Let C = charge in dollars Let m = # of minutes m C 1 17.50 10 17.50 20 17.50 30 17.50 31 17.50 + 0.12 32 17.50 + 0.24 33 17.50 + 0.36 C = 17.50 + 0.12 m Start Value Change C = 17.50 + 0.12 (m- 30) for m > 30

Read Example 4, p. 190 in your textbook.