Free previewCourses

Linear equations in two variables

Question 1 of 3

Know the idea

A line in the $xy$ -plane passes through the points

(3, 7)

and

(5, 5)

. What is the slope of the line?

Worked example

Slope

= \dfrac{y_{2} - y_{1}}{x_{2} - x_{1}} = \dfrac{5 - (7)}{5 - (3)} = -\dfrac{2}{2} = -1

Video walkthrough

Use the existing worked examples and practice while this walkthrough is being prepared.

A workshop uses

4

meters of wire for each small frame and

8

meters for each large frame. It uses exactly

120

meters for

12

small frames and

y

large frames. What is

y