Question

What is the slope of `y=4x-3` at `x=-1`?

Answer 1

slope = 4

Explanation:

one form of the equation of a straight line is y = mx + c
where m represents the slope and c the y-intercept.

In this case y = 4x - 3 is in this form and by comparison can see that m = 4. This will be the same for all values of x.

hence: slope =4

I have included the graph of y = 4x - 3 to illustrate this.
graph{4x - 3 [-10, 10, -5, 5]}