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8th Grade Math - Interpreting slope and y-intercept

Last updated about 5 years ago

7 questions

1

The funciton below represents the cost to attend a fair if you ride r rides.

f(r) = 1.75r + 5

a. What is the y-intercept and what does it mean?

b. What is the slope and what does it mean?

c. If Al spent $19 at the fair, how many rides did Al ride?

1

The function below shows the cost for Mrs. Franklin to go to the buffet with c of her friends.

f(c) = 6.85 + 2.95c

a. What is the slope and what does it mean?

b. What is the y-intercpet and what does it mean?

c. If Mrs. Franklin paid $18.65 for the buffet, how many of her friends did she take?

1

Kolby put $100 into a savings account. The graph below shows how the amount will increase over the next 10 years.

a. What does the y-intercept represent?

b. What is the slope?

1

Rich is a member of a gym. He pays a monthly fee plus a per-visit fee. The equation below represents the amount Rich pays per month to be a member at the gym.

y = 3x + 10

a. What does the y-intercpet represent?

b. What does the slope represent?

1

Nan works as a comissioned sales rep. She works for a weekly base salary plus the commission off of each sale she makes. The table below shows how much Nan can make. What is her weekly base salary? How do you know?

1

What happens to the graph of the equation y=x when it becomes y = x + 3?

1

What happens to the graph of the equation y = x when it becomes y = 3x