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The Anderson family paid $53 to have four pizzas delivered. Five pizzas would cost $65 and 6 pizzas would cost $77. Write an equation to represent the total cost, y, of x pizzas delivered.

Respuesta :

MrRoyal

Answer:

The equation is:

[tex]y =12x+5[/tex]

Step-by-step explanation:

Given

[tex](x,y) = (Pizza,Cost)[/tex]

So, we have:

[tex](x_1,y_1) = (4,53)[/tex]

[tex](x_2,y_2) = (5,65)[/tex]

[tex](x_3,y_3) = (6,77)[/tex]

Required

Equation to represent the scenario

First, calculate the slope

[tex]m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]

So, we have:

[tex]m = \frac{65 - 53}{5 - 4}[/tex]

[tex]m = \frac{12}{1}[/tex]

[tex]m=12[/tex]

So, the equation is:

[tex]y =m(x - x_1) + y_1[/tex]

This gives:

[tex]y =12(x - 4) + 53[/tex]

[tex]y =12x - 48 + 53[/tex]

[tex]y =12x+5[/tex]

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