Question

A = 27 + 0.3 C

Answer 1

Answer:

The amount of potassium chloride that can dissolve in water increases by 0.3 grams for every 1 degree Celsius increase in temperature.

Explanation:

Given

$A = 27 + 0.3C$

Required

Interpret 0.3

We make use of the following illustration to answer this question.

Let C = 1

$A = 27 + 0.3*1 = 27 + 0.3 = 27.3$

Let C =2

$A = 27 + 0.3*2 = 27 + 0.6 = 27.6$

Let C = 3

$A = 27 + 0.3*3 = 27 + 0.9 = 27.9$

Notice that when the values of C increases by 1(i.e. from 1 to 2 and 2 to 3), the values of A increases by 0.3

i.e.

$27.9 - 27.6 = 27.6 - 27.3 = 0.3$

Hence, option D is true