Terry’s 7th grade class started out with 40 students. Over the last 4 months the class has seen a 30% decrease in students. How many students are now in Terry’s class?

28 students

Step-by-step explanation:

30% is equal to .3

40 x .3 equals 12

This means the class has lost 12 students.

40 - 12 is 28.

Another way:

Because the class has lost 30% of it's students, you know that the class is 70% of it's original capacity.

70% is equal to .7

40 x .7 is 28

Step-by-step explanation:

Let y be the value in dollars and x be the number of euros.

If we plot y on the vertical axis and x on the horizontal axis, a straight line would be formed. The slope of the straight line would be

Slope, m = (36 - 9)/(32 - 8)

m = 27/24 = 1.125

The equation of the straight line can be represented in the slope-intercept form, y = mx + c

Where

c = intercept

m = slope

To determine the intercept, we would substitute x = 8, y = 9 and m = 1.125 into y = mx + c. It becomes

9 = 1.125 × 8 + c = 9 + c

c = 9 - 9 = 0

The equation showing the relationship is

y = 1.125x