# Sample quiz on representation of linear relations Main home here.

1. Relations can be represented by $\cdots$
tables
graphs
equations
all of the above
2. In a table of values for a linear relation $\cdots$
the first differences are constant
the first differences are equal to zero
the second differences are constant
the second differences are equal to zero
3. The graph of a linear relation is $\cdots$
a curve
a parabola
a straight line
a horizontal line
4. In an equation of a linear relation, the (positive integer) exponents on $x$ and $y\quad \cdots$
should both be zero
should both be one
should both be at least one
should both be at most one
5. Which of the equations below represent a linear relation?
$y-2x^2-4=0$
$y-2x-4=0$
$y-2x^{-1}-4=0$
$y-2x^{-2}-4=0$
6. If the equation $y=3x^{k}-12$ is to represent a linear relation, what value should $k$ take?
$1$
$2$
$-1$
$-2$
7. For what value of $k$ is the relation $y=2x^{2}+k$ a linear relation?
$k=0$
$k=1$
no value of $k$
all values of $k$
8. Which of the following is not a linear relation?
$y=0$
$y=1$
$y=x$
$y=x^2$
9. The first differences from a table of values of a linear relation are always constant. In addition:
they can be positive or negative
they are always positive
they are always negative
they are always zero.
10. If the first differences for a linear relation is zero, then:
the graph will be vertical
the graph will be horizontal
the graph will make angle $45^{\circ}$ with the $x$-axis
the graph will make angle $90^{\circ}$ with the $x$-axis