Question

(50 POINTS!) You buy a bottle of water and a dish of frozen yogurt. The table shows the total cost of the purchase for different amounts of frozen yogurt. Write a linear model that represents the total cost

as a function of the number of ounces of frozen yogurt.

Answer 1

0.4x+2

Explanation:

Answer 2

• y = 0.4x + 2

Explanation:

Use two pairs of points from the table:

• (4, 3.6), (5, 4)

The function in slope-intercept form:

• y = mx + b

Find the slope:

• m = (4 - 3.6)/(5 - 4) = 0.4/1 = 0.4

Use one of the points and find the y-intercept:

• 4 = 0.4*5 + b
• b = 4 - 2
• b = 2

The line is:

• y = 0.4x + 2