Grandpa ernie is shrinking over the past four years his height decreased by a total of 2.4 cm it decrease by the same amount each year what was the change in grandpa ernie’s height each year

The change in grandpa Ernie’s height each year is -0.6 cm per year.

The equation of a straight line is given by:

y = mx + b;

where y,x are variables, m is the slope of the line and b is the y intercept.

Let y represent the height of Grandpa Ernie after x years. Let the decrease per year be k. Hence:

y = kx

After four years his height decreased by a total of 2.4 cm, hence:

-2.4 = k(4)

k = -0.6 cm per year

Hence, the change in grandpa Ernie’s height each year is -0.6 cm per year.

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-0.6cm/year

Step-by-step explanation:

His height decreased by 2.4 cm in 4 years.

-0.6cm/year

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