Question

Hey guys csnnu please help asap

Answer 1

Hi there. I'll be answering both questions on in the screenshot as I can make both of them out.

For 18.)
The coordinates on a graph are determined by the function "(x,y)", which are values based on the x-axis and y-axis on the graph.
The horizontal line, or the one that goes left to right, is the x-axis, while the vertical line, or the one that goes up and down, is the y-axis.

As we can see in the graph, the point lies on the x-value of 5, and meets up with the y-value of 7; therefore, the coordinates for the point are C.) (5,7)

For 19.)
The Millers drove 150 miles in 3 hours. To determine how long it takes for them to drive 400 miles, we need to find a scale factor. Simply divide 150 by 3 to get how many miles per hour on average they are going. 
150 / 3 = 50; divide 400 by 50 to determine how many hours it takes.
400 / 50 = 8

It took the Millers B.) 8 hours to drive 400 miles.

I hope this helps!

Answer 2

C. (5,7) is the correct answer for this problem. First you look at the x axis (across) then the y axis (up and down).