w riting a f unction r ule :. w rite a function rule from the table : xf(x) 1 20 31 42

WRITING A FUNCTION RULE:

WRITE A FUNCTION RULE FROM THE TABLE:

x F(x)1 -1

2 0

3 1

4 2


x F(x)1 -1

2 0

3 1

4 2

Ask yourself, “What can I do to 1 to get to -1, 2 to get to 0….?


x F(x)1 -1

2 0

3 1

4 2


Subtract 2 from each input value.


x F(x)1 -1

2 0

3 1

4 2



So, f(x) equals x minus 2.


x F(x)1 -1

2 0

3 1

4 2



So, f(x) equals x minus 2.

f(x) = x – 2


x f(x)-4 -2-2 -16 38 4

Ask yourself, “What can I do to -4 to get to -2?” to -2 to get to -1…?

WRITE A FUNCTION RULE FROM A VERBAL EXPRESSION, AND SOLVE USING THE RULE:

WRITE A FUNCTION RULE FROM A VERBAL EXPRESSION, AND SOLVE USING THE RULE: Your uncle Fred loaned you $210 to buy a

lawn mower. You charge $35 to mow one lawn. Write the function rule for your profit. Determine the breakeven point.


lawn mower. You charge $35 to mow one lawn. Write the function rule for your profit. Determine the breakeven point. Profit is equal to income less the expense.


lawn mower. You charge $35 to mow one lawn. Write the function rule for your profit. Determine the breakeven point. Profit is equal to income less the expense. Profit is the dependent variable since it depends

on the number of lawns you mow.



on the number of lawns you mow. Therefore, the independent variable is the

number of lawns mowed, and represents the income.



on the number of lawns you mow. Therefore, the independent variable is the

number of lawns mowed, and represents the income.

The constant quantity is the cost of the lawn mower, and represents the expense.

WRITE A FUNCTION RULE FROM A VERBAL EXPRESSION, AND SOLVE USING THE RULE: Your uncle Fred loaned you $210 to buy a lawn

mower. You charge $35 to mow one lawn. Write the function rule for your profit. Determine the breakeven point. Profit is equal to income less the expense. Profit is the dependent variable since it depends

on the number of lawns you mow. Therefore, the independent variable is the number

of lawns mowed, and represents the income. The constant quantity is the cost of the lawn

mower, and represents the expense. At the breakeven point there is no profit, p(m) = 0





mower, and represents the expense. At the breakeven point there is no profit, p(m) = 0 m = number of lawns mowed





mower, and represents the expense. At the breakeven point there is no profit, p(m) = 0 m = number of lawns mowed p(m) = profit (profit is a function of m)


mower. You charge $35 to mow one lawn. Write the function rule for your profit. Determine the breakeven point. Profit is equal to income less the expense. Profit is the dependent variable since it depends on

the number of lawns you mow. Therefore, the independent variable is the number of

lawns mowed, and represents the income. The constant quantity is the cost of the lawn mower,

and represents the expense. At the breakeven point there is no profit, p(m) = 0 m = number of lawns mowed p(m) = profit (profit is a function of m) Your profit equals your income minus your expenses


mower. You charge $35 to mow one lawn. Write the function rule for your profit. Determine the breakeven point. Profit is equal to income less the expense. Profit is the dependent variable since it depends on

the number of lawns you mow. Therefore, the independent variable is the number of

lawns mowed, and represents the income. The constant quantity is the cost of the lawn mower,

and represents the expense. At the breakeven point there is no profit, p(m) = 0 m = number of lawns mowed p(m) = profit (profit is a function of m) Your profit equals your income minus your expenses Profit = 35 times the number of lawns mowed minus

cost of the mower.

WRITE A FUNCTION RULE FROM A VERBAL EXPRESSION, AND SOLVE USING THE RULE: Your uncle Fred loaned you $210 to buy a lawn mower.

You charge $35 to mow one lawn. Write the function rule for your profit. Determine the breakeven point. Profit is equal to income less the expense. Profit is the dependent variable since it depends on the

number of lawns you mow. Therefore, the independent variable is the number of

lawns mowed, and represents the income. The constant quantity is the cost of the lawn mower, and

represents the expense. At the breakeven point there is no profit, p(m) = 0 m = number of lawns mowed p(m) = profit (profit is a function of m) Your profit equals your income minus your expenses Profit = 35 times the number of lawns mowed minus cost

of the mower. p(m) = 35m – 210

TO FIND THE BREAK EVEN POINT, SET THE PROFIT EQUAL TO ZERO.

TO FIND THE BREAK EVEN POINT, SET THE PROFIT EQUAL TO ZERO. 0 = 35m – 210

w riting a f unction r ule :. w rite a function rule from the table : xf(x) 1 20 31 42

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