### Home > PC > Chapter 2 > Lesson 2.3.3 > Problem 2-100

2-100.

Find the slope of the line going through *g*(1) and *g*(4).

Substitute the point and the slope in the point-slope form to find the equation.

(*g*(*x*) − 5) = 0.5(*x* − 4)*g*(*x*) = 0.5*x* − 2 + 5*g*(*x*) = 0.5*x* + 3

Write the Sigma notation.

Add up the terms.