What number is halfway between 100,000 and 200,000

Simone claims the initial value and y-intercept are the same thing on a graph. is she correct? if you know that a line has a slope of and a y-intercept of 7, what is the equation for that line in slope-intercept form?

Select the quadratic that has root x = 8 and x = -5

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply