8.5i Slope and y-intercept

What is the correct slope-intercept form?

(a)  

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• "x"

• slope

• y-intercept

• mathematics 

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• "y"

• slope

• y-intercept

• because

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A coach is ordering trophies for a team.

The coach pays a one-time fee of $15. The coach also pays $4 for each trophy.

Which function can be used to find c, the total amount the coach pays in dollars when t trophies are ordered?

• c = 4t + 15

• c = 4t - 15

• c = 15t + 4

• c = 15t - 4

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Ashley is saving $18 that she earned for babysitting. She earns $7 every week for doing chores at home, which she also saves. Which function can be used to find t, the total amount of money Ashley will have saved at the end of w, weeks of doing chores?

• t = 7w + 18

• t = 18w + 7

• t = 25w

• t = 18w

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Carlos bought a video game. He made an initial payment of $75 to the store, and he will pay $5 each month until the game is paid off. Which equation represents the relationship between m, the number of monthly payments Carlos has made, and t, the total amount that Carlos has paid the store?

• t = 75m + 5

• t = 5m - 75

• t = 75m + 80

• t = 5m + 75

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What is the slope-intercept equation?

• y= 4x - 17

• y = 4x - 21

• y = 21x - 4

• y= -1x + 4

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What is the algebraic equation for the following table?

• y = x + 3

• y = 3x

• y = x ÷ 3

• y = x - 3

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What is the slope-intercept equation?

• y= - 5/2x - 1
• y= - 2/5x + 1
• y= - 5/3x - 1
• y= 3/5x + 1

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Which linear function best describes the graph above?

• y=3/5x+4

• y=5/3x+4

• y=3/5x-6.5

• y=5/3x+6.5

Answer explanation

We can see that the y-intercept (b) is 4. From there, using rise/run, we can see that we go up 3 and over 5, making the slope 3/5. Substituted into the equation y=mx+b, we would have the equation y=3/5x+4.

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