What is the effect on the graph of the parent function f(x) = x when f(x) is replaced with f(x - 7)? a: shifts the line 7 units up b: shifts the line 7 units down c: increases the slope of the line by 7 d: decreases the slope of the line by 7

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.