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Can someone help me with this question?

Can someone help me with this question?-example-1

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Answer:

A) y = 0.3x+24

B) 283.5 dollars

Explanation:

A) To create an equation in slope-intercept form, we can start by using the numbers the problem gave us and represent them as coordinates. Generally, time is always our x-value.

(230,93)

(530,183)

Now that we have our two coordinates, we can plug them into the slope-intercept formula: y₂-y₁/x₂-x₁ to find our slope.

(183-93)/(530-230) = 0.3

Now that we have our slope, we can plug it into our equation.

y = 0.3x + b

To find our y-intercept, we can take either one of our 2 coordinates (x,y) and plug them into the equation to solve for b.

93 = 0.3(230) + b

93 = 69 + b

93 - 69 = b

b = 24

Now that we have found our y-intercept, we can plug it into b to complete the equation.

y = 0.3x +24

B) If 865 minutes are used, we can plug 865 into x in our equation to find the total cost.

0.3(865) + 24 = 283.5

User Rahiem
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