Question

A.

How can the graph for the rule y= 2x+1 be used to predict the result for an
input (x-value) of 7? How can the graph be used to predict the output
(y-value) associated with an input of 3?

Answer 1

The result for an input of 7 is:
`y=15`

The output (y-value) associated with an input of 3 is:
`y=7`

Explanation:

The image attached shown the graph for the rule
`y= 2x+1`.

In order to use the graph to predict the result for an input value of 7, you need to follow these steps:

- Draw a vertical line from
`x=7`

- When the vertical line touches the graph, you must draw a horizontal line to the y-axis to find the y-value.

You can observe in the graph that the result for an input value of
`x=7` is
`y=15`

Follow these steps in order to use the graph to predict the output value associated with an input value of 3:

- Draw a vertical line from
`x=3`

- When the vertical line touches the graph, you must draw a horizontal line to the y-axis to find the y-value.

You can observe in the graph that the output value associated with an input value of
`x=3` is
`y=7`