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A loaf of bread costs
$2.50 and appler cosest
$1.29 per pound. Write a linear function to represent the price of a loaf of bread and some apples. Graph the function on a separate sheet of paper. How much will you pay if you buy 3 pounds of apples?
qquad

=5x. What do you
bout the relationship

$24$ . A loaf of bread costs $\$ 2.50$ and appler cosest $\$ 1.29$ per pound. Write a linear function to represent the price of a loaf of bread and some apples. Graph the function on a separate sheet of paper. How much will you pay if you buy $3$ pounds of apples? $\qquad$ $\newline$ $=5 x$ . What do you $\newline$ bout the relationship

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Evaluate two-variable equations: word problems

Full solution

Q.

24

. A loaf of bread costs

\$ 2.50

and appler cosest

\$ 1.29

per pound. Write a linear function to represent the price of a loaf of bread and some apples. Graph the function on a separate sheet of paper. How much will you pay if you buy

3

pounds of apples?

\qquad

\newline

=5 x

. What do you

\newline

bout the relationship

Define variables: Define the variables for the linear function. Let $x$ represent the number of pounds of apples.
Write linear function: Write the linear function. The cost of a loaf of bread is constant at $\$2.50$ , so that's the y-intercept. The cost of apples is $\$1.29$ per pound, so that's the slope. The function is $y = 1.29x + 2.50$ .
Substitute $x$ with $3$ : To find the cost for $3$ pounds of apples, substitute $x$ with $3$ in the function. $y = 1.29(3) + 2.50$ .
Calculate cost for $3$ pounds: Calculate the cost for $3$ pounds of apples. $y = 3.87 + 2.50$ .
Add costs of apples and bread: Add the cost of the apples to the cost of the bread. $y = 3.87 + 2.50 = 6.37$ .

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