How does the speed change on the graph? and what does a steeper line mean?

Which is f(5) for the function –2x2 + 2x - 3?

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.

What are the coordinates of the image of p for a dilation with center (0, 0) and scale factor 2