(04.04)
The swimming team has competed in 45 races this season. They have won 30 races so far. How many races will the team need to win today for the team to have a
75% success rate?
8
10
12
15

-4

Step-by-step explanation:

We know that the general way directly proportional equations are formed is y = k × x where 'k' is the constant so let's start substituting in the values,

y = k × x

→ The first step would be to substitute in  y = -16 when  x = 6 so then we can find the 'constant'

-16 = k × 6

→ Divide both sides by 6 to isolate k

  =    k

Now we know the value of k we can substitute x = 1.5 in the equation with 'k' as so

y =  × x

→ Substitute in 'x'

→ Simplify

y = -4

Find y when x = 1.5, if y varies  directly as x and y = -16 when  x = 6. The value of y when x = 1.5 is -4