What transformation of the parent function f(x) is made to get -2f(x)? A. A reflection of the X axis and a vertical stretch by 2
B. Vertical vertical stretch by 2
C. A reflection on the y axis
D. A reflection in the x axis

Ineed i do not understand i'm only 8

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.