Question

Please help me solve this algebra homework question asap (9)

Answer 1

Let us work on the equation of Data plan A

Let us pick any two data from the information given on Data plan A in order to obtain the equation.

Therefore, the two points picked are

`\begin{gathered} (x_1,y_1)\rightarrow(5,39) \\ (x_2,y_2)\rightarrow(20,99)_{} \end{gathered}`

The formula to obtain the equation is,

`(y-y_1)/(x-x_1)=(y_2-y_1)/(x_2-x_1)`

Hence, the equation of Data plan A is

`\begin{gathered} (y-39)/(x-5)=(99-39)/(20-5) \\ (y-39)/(x-5)=(60)/(15) \\ (y-39)/(x-5)=4 \end{gathered}`

Cross multiply