Can someone me figure out the rule for number 2? will mark

Answer this question, only if you know the answer. 30 points and brainliest!

Consider the function f(x)=-5x+3 what is f(-2)

Iwill give brainliest. give accurate answer, . suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?