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Plot a point at the y-intercept.

Step-by-step explanation:

You start by plotting the y-intercept because you'll already have the value when you substitute x as 0 in the expression.

y = 0.5(0) -4

y = -4

Length AB is an illustration of Pythagoras theorem.

The length of AB is (G)

The given figure is a right-angled triangle.

Such that:

AC = 7

BC = 5

AB = ?? The hypotenuse

Using Pythagoras theorem, we have:

Substitute values for AC and BC

Evaluate squares

Add

Take square roots

Hence, the value of AB is (G)

Read more about Pythagoras theorem at:

link