Please help and explain well! Please hurry up, it's due by the end of the period.

Proportions in triangles solve for x

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.

Graph the line with the given slope m and y-intercept b. m=-3,b=1