What the rate of change of f(x)=2x-3

The rate of change per x value is 2.

We know this because the slope is 2, and the slope dictates the amount of change.

The line is written in slope intercept form, which is y = mx + b

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

answer: 193

explanation:

200-7 = 193