Hello :
the line has an undefined slope if paralel a axis- y : equation x = 1 (<span>passes through the point (1, 3))</span>
Chart are use to represent the visual outcome or status of a business, or an activity or even for any kind of reason as long as the data is complete and relevant. In addition to this, people you charts as a basis or a way of showing the growth of their work. Many people use it so that they can easily makes decision basing to what is the outcome they see in their charts.
I personally think it's C I hope it's right if not I'm Sorry
3x-10+2x=115
5x-10=115
5x=125
x=25
m<b=3(25)-10=65
m<C=2×25=50
