WRITING EQUATIONS FROM WORD PROBLEMS

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WRITING EQUATIONS FROM WORD PROBLEMS EOC TEST STRATEGY- DAY 10 WRITING EQUATIONS FROM WORD PROBLEMS

TEST STRATEGIES FOR LINEAR RATE OF CHANGE 1). Recognize key terms & formats for linear rate of change. 2). Identify whether a problem will use linear rate of change. 3). Read the table to find the linear rate of change. 4). Read the table to find the linear rate of change w/out incremental change in x. 5). Read the table to find the linear rate of change between specified pts. 6). Interpret rate of change in context 7). Extend table to find equation 8). Use calculator to find equation. 9). Interpret the constant & coefficient. 10). Finding specific range value for a given domain value.

Review: KEY WORDS that indicate slope EACH EVERY RATE PER Also -monthly, weekly, daily, a, average…

Review: KEY PHRASES that indicate y-intercept INITIALLY TO START WITH FIXED RATE BEGINNING WITH AT FIRST SERVICE FEE OR TRUCK FEE

EXAMPLE #10.1 FIND: Key word for linear equation: Key word for slope: Key word for y-intercept: A vintage car’s value is $45,000 when Bubba first purchased it in 1980 and the value appreciated at a constant rate of $200 every year. Write an equation for this situation.

EXAMPLE #10.1 (con’t). EXTEND: What is x & y representing ? *HINT: TIME is usually “x”. A vintage car’s value is $45,000 when Bubba first purchased it in 1980 and the value appreciated at a constant rate of $200 every year. Write an equation for this situation.

You Try: (wkst #10) *Mark the text to indicate key words for Linear Slope Y-intercept *Write the equation!

CHECK IT #10.2 Big Betty wants to get a tattoo like her boyfriend Bubba. At “INK THIS” tattoo shop, the artist charges $45 to draw the design and $12 per 30 minutes to tattoo it. Assuming a constant rate of change, write an equation for this situation.

Check it # 10.3 A computer consulting company charges an hourly rate of $15 plus a $50 service fee. Write a linear equation to model the conditions of the problem.

CHECK IT #10.4 The price for a gallon of milk was $0.78 in 1975 and has increased linearly by an average of $.20 yearly. Write an equation for this situation.

CHECK IT #10.5 Big Betty wants to have her house painted. The painters charge an initial fee of $35 to come out and give an estimate and then $20 each hour they paint. Write a linear equation to model the conditions of the problem.