### Home > A2C > Chapter 4 > Lesson 4.2.1 > Problem 4-72

4-72.

Use the eTool below to graph the line.

Click the link at right for the full version of the eTool: A2C 4-72 HW eTool

Try using a slope-intercept equation.

*y* = *mx* + *b*

Use the slope and *y*-intercept to make the equation.

*y* = 3*x* + 2

Substitute 1, 2, 3, and 4 for *n* to find the terms.

*t*(1) = 3 –1 *t*(2) = 6 –1 *t*(3) = 9 –1 *t*(4) = 12 – 1

Graph the results.

*t*(1) = 2 *t*(2) = 5 *t*(3) = 8 *t*(4) = 11

Notice that both graphs have the same slope.

The graphs are parallel, but they have different intercepts. The first is continuous and the second is discrete.