Modeling with Linear Functions · Exercise 2

Graph and interpret applications of slope–intercept form of a linear function.

A function that will convert women’s dress sizes in the US, x, to dress sizes in Italy, I(x), is given by:
$I\left(x\right)=2\left(x+10\right)$
ⓐ
$$\begin{array}{cc}\text{x, US women’s size}& I\left(x\right)=2\left(x+10\right)\text{ Italian women’s size}\\ \text{4}& \\ \text{10}& \\ \text{16}& \end{array}$$

ⓑ Interpret the slope and y-intercept (or I intercept) for this linear function in terms of the variables used in the problem.
ⓒ Graph the function below. Be sure to show the scale you are using.

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Algebra and Trigonometry 2e · §4.2 Modeling with Linear Functions · Exercise 2