Question

7-81. Aja and Emilie were riding their skateboards. They knew that they could ride 3 miles in 20 minutes.

Answer 1

Answer:

$y=\frac{3}{20}x$

Step-by-step explanation:

We want to write an equation of the form '

$y=mx+b$

Now $m$ is the slope of the line or 'rise/run', and it is

$m=\frac{ \Delta y }{ \Delta x } =\frac{3miles}{20minutes} =\frac{3}{20}$

Now for $b.$

Since at x=0 y= 0 (Aja and Emile haven't traveled any distance)

$0=0+b\\b=0$

Thus we have the equation

$y=\frac{3}{20}x$