If $f$ is a function defined from $R$ to $R$ as follows: $f\left(x\right)=x^2$

Find the range of the function.

If $g$ is a function defined from $R$ to $R$ as follows:  $g\left(x\right)=\sin x$

Find the range of the function.

If $h$ is a function defined from $R$ to $R$ as follows: $h\left(x\right)=x^2+1$

Find the range of the function.

Let $X=\{\mathrm{1,} 2, \mathrm{3,} 4\}$ and $Y=\{\mathrm{1,} 5, \mathrm{9,} \mathrm{11,} \mathrm{15,} 16\}$

Determine whether the following set is a function from $X$ to $Y$

$f_1=\left\{\left(\mathrm{1,1}\right), \left(2, 11\right), \left(3, 1\right), \left(4, 15\right)\right\}$

Let $X=\{\mathrm{1,2},\mathrm{3,4}\}$ and $Y=\{\mathrm{1,5},\mathrm{9,11,15,16}\}$

Determine whether the following set is a function from $X$ to $Y$:

$f_2=\left\{\left(\mathrm{1,1}\right),\left(\mathrm{2,7}\right),\left(\mathrm{3,5}\right)\right\}$

Let $X=\{\mathrm{1,2},\mathrm{3,4}\}$ and $Y=\{\mathrm{1,5},\mathrm{9,11,15,16}\}$

Determine whether the following set is a function from $X$ to $Y$:

$f_3=\left\{\left(\mathrm{1,5}\right),\left(2,9\right)\left(\mathrm{3,1}\right),\left(\mathrm{4,5}\right),\left(\mathrm{2,11}\right)\right\}$.