Question 1

The graph below shows the relationship between the number of minutes Ray walks and the number of calories he burns.

Which equation can be used to find the number of calories $(y)$ Ray burns when he walks for $x$ minutes?

Accepted Answer

$y = 4x$

Answer

$y = x + 4$

Answer

$y = x - 4$

Answer

$y = \frac{x}{4}$

Question 2

Line $j$ and line $k$ are graphed on the same coordinate grid.

$\quad\bullet\enspace$ Line j has a slope of $\frac{-2}{3}$ and intersects the y-axis at $-4$.
$\quad\bullet\enspace$  Line k has a different negative slope than line $j$ and intersects the $	ext{y-axis}$ above line $j$.

Which equation could describe line $k$?

Accepted Answer

$y=\frac{-1}{6}x$

Answer

$y=\frac{-2}{3}x-3$

Answer

$y=\frac{-1}{2}x-5$

Answer

$y=x+1$

Question 3

Fran buys used DVDs. She pays $$\$2.75$$ for each DVD she buys. She graphs a line to show the total amount $(y)$, in dollars, she pays to buy $x$ used DVDs. Which equation correctly describes Fran's line?

Accepted Answer

$y = 2.75x$

Answer

$y = x + 2.75$

Answer

$y = 2.75x + 2.75$

Answer

$y = 2.75$

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