Line ab and cd (if presented in the picture) are straight lines. Find x (the pictures are not scaled)

Aportion of a line bounded by two points is defined as

Based on the graph, what is the initial value of the linear relationship? a coordinate plane is shown. a line passes through the y-axis at -2 and the x-axis at 3.

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?