Point $\pink{A}$ is at $(-10, -9)$ and point $\blue{B}$ is at $(5, -4)$.
If point $\purple{M} = (1 - t)\pink{A} + t\blue{B} = (-4, -7)$, what is the value of $t$? [[☃ math-keypad 1]]
You can use the interactive diagram below to help you :
[[☃ iframe 1]]