Lesson 2: Linear Functions — Practice Questions

1. 1. For the equation $y=\frac{2}{3}x + 2$, find the value of $y$ when $x=3$. $y = $ ___.

2. 2. If you plot all the points on a Cartesian plane whose x-coordinate is -3, what geometric figure do you get?

   • A. A vertical line
   • B. A horizontal line
   • C. A single point
   • D. A circle

3. 3. Evaluate the expression $c-d$ for $c = -3$ and $d = -5$. The result is ___.

4. 4. For the equation $y=x-1$, what is the value of $y$ when $x = 4$? $y = $ ___.

5. 5. For the equation $y=-3x$, what is the value of $y$ when $x = -2$? $y = $ ___.

6. 6. Evaluate the expression $-3m-2n$ for $m = -5$ and $n = -2$. The result is ___.

7. 7. For the equation $y=\frac{1}{2}x - 4$, find the value of $y$ when $x=-2$. $y = $ ___.

8. 8. Evaluate the expression $\frac{5-r}{-15-s}$ for $r = 5$ and $s = 15$. The result is ___.