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Open Up - Grade 8 - Mathematics - Unit 3 - Lesson 12

By Formative Library
Last updated about 3 years ago
8 Questions

Select all of the ordered pairs (x,y) that are solutions to the linear equation 2x + 3y = 6.

The graph shows a linear relationship between x and y.
x represents the number of comic books Priya buys at the store, all at the same price, and y represents the amount of money (in dollars) Priya has after buying the comic books.
Find and interpret the x- and y-intercepts of this line.

The graph shows a linear relationship between x and y.
x represents the number of comic books Priya buys at the store, all at the same price, and y represents the amount of money (in dollars) Priya has after buying the comic books.
Find and interpret the slope of this line.

The graph shows a linear relationship between x and y.
x represents the number of comic books Priya buys at the store, all at the same price, and y represents the amount of money (in dollars) Priya has after buying the comic books.
Find an equation for this line.

The graph shows a linear relationship between x and y.
x represents the number of comic books Priya buys at the store, all at the same price, and y represents the amount of money (in dollars) Priya has after buying the comic books.
If Priya buys 3 comics, how much money will she have remaining?

Match each equation with its three solutions.

(1,1\frac{1}{3}),(-1,3),(0,2\frac{1}{3})
y = 1.5x
(0,5, 3),(1,6),(1.2, 7.2)
2x +3y = 7
(\frac{1}{2},\frac{1}{2}),(\frac{1}{4},\frac{3}{4}), (\frac{1}{8}, \frac{7}{8})
x - y = 4
(-3, -7), (0,-4), (-1, -5)
3x = \frac{y}{2}
(14,21),(2,3),(8,12)
y = -x +1

A container of fuel dispenses fuel at the rate of 5 gallons per second. If represents the amount of fuel remaining in the container, and x represents the number of seconds that have passed since the fuel started dispensing, then x and y satisfy a linear relationship.

In the coordinate plane, will the slope of the line representing that relationship have a positive, negative, or zero slope?

A sandwich store charges a delivery fee to bring lunch to an office building. One office pays $33 for 4 turkey sandwiches. Another office pays $61 for 8 turkey sandwiches.

How much does each turkey sandwich add to the cost of the delivery?

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