Write the equation of a direct variation that passes through the point (-11, 13) A. y = 13x
B. y = -11x
C. y = -13/11x
D. y = -11/13x

A direct variation equation is of the form y = m⋅x for some constant value m.

For a direct variation equation passing through

(x,y) = (-11,13)

13 = m × - 11

→ m = - 13/11.

so, as y = m⋅x

y = - 13/11x

Hence, the direct variation equation is [C] - 13/11x.

log7 + log7 − log7 = + log7

This is correct answer

Step-by-step explanation:

Explanation:-

we will use properties of logarithm

first property

i) log (ab) = log a + log b

second property  

ii)

Third property

iii)

Now given log7 +log7 - log7

                                           = log(7X7) - log7 ( used first property)

                                           = log(49)- log(7)

                                           =        (used second property)

                                          = + log(7)