Question

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Answer 1

These are 3 questions and 3 answers.


1) Question 18


Answer: 3


Explanation:


i) Equation given: 3x - y = - 4


ii) Transform to slope-intercept form: y = mx + b, where m is the slope.

y = 3x + 4

iii) Then, the slope is m = 3.

2) Question 19

Answer: 


17 horizontal layers

43 bricks are left

Explanation:


i) Data:


number of bricks: 5500

number of bricks per horizontal layer: 321

ii) Calculations:


Divide the number of bricks by the number of bricks per horizontal layer: you need both the quotient and the remainder.


5500 ÷ 321 = 17 and 43 are left.


3) Question 20


Answer: indefinite

Explanation:


The line is vertical.

All the vertical lines have indefinite slopes.


That is because the slope is given by:


              slope = change in y / change in x.


But x is constant, which means that the change in x is zero. And, since the division by zero is not defined, the slope is not indefinite.