If you are looking for an equation that is parallel to y = 4x -19, we know the answer must have the same slope. The slope of the given equation is 4 (because m = 4 in this case), therefore, we can eliminate answers a) and b). Next, we need a y-intercept, or "b". I will take the equation of a line: y = mx + b, substutute the given (0, 7) into the equation 7=m(0) + b, and substitute the 4 as the slope, so 7 = 4(0) + b. Simpllify this to 7 = b. Find an answer that has 7 as the "b" and 4 as the "m", and we have answer D.
13. 10-14 14.I can't see the whole graph, so you need to do it yourself. Add up everyone's age and divide by the amount of people on the graph. That will give you the average.
