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konstantin123 [22]
3 years ago
13

Write a linear equation that represents the cost of buying t-shirts from Paula's printing. identify the meaning of each variable

in your equation.
write a linear equation that represents the cost of buying t-shirts from shantay's shirts. identify the meaning of each variable in your equation.​

Mathematics
1 answer:
g100num [7]3 years ago
6 0

Answer:

Part 1) y=x+21.5

Part 2) y=x+18

Step-by-step explanation:

Part 1) Write a linear equation that represents the cost of buying t-shirts from Paula's printing.

Let

x ----> the number of t-shirts

y ----> the cost in dollars

step 1

Find the slope

The formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{x2-x1}

take two points from the table

(2,23.5) and (4,25.5)

substitute in the formula

m=\frac{25.5-23.5}{4-2}

m=\frac{2}{2}=1

step 2

Find the equation of the line in point slope form

y-y1=m(x-x1)

we have

m=1

(x1,y1)=(2,23.5)

substitute

y-23.5=(1)(x-2)

Convert to slope intercept form

y=mx+b

y=x-2+23.5

y=x+21.5

Part 2) Write a linear equation that represents the cost of buying t-shirts from Shantay's shirts.

Let

x ----> the number of t-shirts

y ----> the cost in dollars

step 1

Find the slope

The formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{x2-x1}

take two points from the table

(2,20) and (4,22)

substitute in the formula

m=\frac{22-20}{4-2}

m=\frac{2}{2}=1

step 2

Find the equation of the line in point slope form

y-y1=m(x-x1)

we have

m=1

(x1,y1)=(2,20)

substitute

y-20=(1)(x-2)

Convert to slope intercept form

y=mx+b

y=x-2+20

y=x+18

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