1.3 b

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 3

Welcome

today:

check homework 10, 12, 13 en 14 (use your phone and notebook)

simultaneous equations

Ex 12d: What are the coordinates of the point of intersection?

Ex 13d: What are the coordinates of the point of intersection?

Ex 14: What is the function of g(x)?

Ex 14: What is the function of h(x)?

f(x) = ax + b

function

y = ax + b

equation

There is a third way to describe a line:

px + qy = r

Now you cannot read off the gradient and y-intercept!

But how can this be the same?

6x + 3y = 12

and

y = -2x + 4

Exercise 16b 

Simultaneous equations

Two ways to solve:

1. Rearrange both formulas into the form y = ax + b. Make these equations equal to each other.

2. Substitute one formula into the other.

Exercise 18b 

Homework

do ex. 16c/d, 17, 18c/d  and 19 of 1.3