For a relation to be called a function, it must pas the vertical line test and each x-value must have a unique y-value
<span>The graph of this sequence would pass the vertical line test.
</span>Each day corresponds to a unique amount of pennies in this sequence.
The cost of one sandwich is $3.90
The cost of one deknk is $1.50
hopefully this is correct
When you plug the equation into a graphing calculator the x-intercept is -5
Or you can set the equation equal to 0 and solve for x.